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mondofacto - Online Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 26/01/2008, UK Words: 116197

sinistrorotation
Synonym for sinistrotorsion ... A turning or twisting to the left. ... Synonym: levorotation, levotorsion, sinistrogyration, sinistrorotation. ... Origin: sinistro-+ L. Torsio, a twisting (torsion) ... (05 Mar 2000) ...

sinistrorse
Turned or twisted to the left. ... Origin: L. Sinistrorsus, on the left side, fr. Sinister, left, + verto, pp. Versus, to turn ... (05 Mar 2000) ...

sinistrotorsion
A turning or twisting to the left. ... Synonym: levorotation, levotorsion, sinistrogyration, sinistrorotation. ... Origin: sinistro-+ L. Torsio, a twisting (torsion) ... (05 Mar 2000) ...

sink
1. A drain to carry off filthy water; a jakes. ... 2. A shallow box or vessel of wood, stone, iron, or other material, connected with a drain, and used for receiving filthy water, etc, as in a kitchen. ... 3. A hole or low place in land or rock, where waters sink and are lost; called also sink hole. Sink hole. The opening to a sink drain. A cesspool. …

sinker
One who, or that which, sinks. Specifically: ... A weight on something, as on a fish line, to sink it. ... In knitting machines, one of the thin plates, blades, or other devices, that depress the loops upon or between the needles. Dividing sinker, in knitting machines, a sinker between two jack sinkers and acting alternately with them. Jack sinker. S …

sinoatrial
<anatomy> Relating to the sinus venosus and the right atrium of the heart. ... Synonym: sinuatrial. ... (20 Jun 2000) ...

sinoatrial block
<cardiology, physiology> Disturbance of heart conduction in which the atrial response is delayed or omitted because of partial or complete interference with the propagation of impulses from the sinoatrial node to the atria. ... (12 Dec 1998) ...

sinoatrial chamber
<anatomy> The common chamber formed by the single embryonic atrium and the right and left horns of the sinus venosus. ... (20 Jun 2000) ...

sinoatrial conduction time
<cardiology, physiology> The time required for an impulse to travel from the sinoatrial node to the atrium; estimated indirectly during asystole by halving the average interval from the premature beat to the following normal sinus beat of the atrium. ... (05 Mar 2000) ...

sinoatrial nodal artery
<anatomy, artery> A branch usually of the right coronary artery that supplies the sinuatrial node. ... Synonym: sinus node artery. ... (05 Mar 2000) ...

sinoatrial recovery time
<cardiology, physiology> Interval from the last paced P wave to the first succeeding spontaneous P wave (after 2 to 5 minutes of right atrial pacing at 120 to 140 beats per minute, and when expressed as percentage of control cycle length, it normally ranges from 115 to 159%). ... (05 Mar 2000) ...

sinoauricular block
Synonym for sinoatrial block ... <cardiology, physiology> Disturbance of heart conduction in which the atrial response is delayed or omitted because of partial or complete interference with the propagation of impulses from the sinoatrial node to the atria. ... (12 Dec 1998) ...

sinography
Radiologic use of a contrast medium to opacify a sinus tract. ... Origin: sinus + G. Grapho, to write ... (05 Mar 2000) ...

sinopulmonary
<anatomy> Relating to the paranasal sinuses and the pulmonary airway. ... (05 Mar 2000) ...

sinovaginal
<anatomy> Relating to that part of the vagina derived from the urogenital sinus. ... (05 Mar 2000) ...

sinoventricular conduction
<cardiology, physiology> A rare form of conduction of the sinus impulse during paralysis of the atrial muscle by hyperkalaemia. ... The impulse leaves the sinus node and enters the internodal tracts rapidly achieving the junctional tissues but without inscribing a P wave due to the inactivation of the atrial muscle cells. ... (05 Mar 2000) ...

sinter
<chemical> Dross, as of iron; the scale which files from iron when hammered; applied as a name to various minerals. Calcareous sinter, a loose banded variety of calcite formed by deposition from lime-bearing waters; calcareous tufa; travertine. Ceraunian sinter, fulgurite. Siliceous sinter, a light cellular or fibrous opal; especially, geyser …

sinuate
With deep, wave-like depressions along the margin. ... Compare: undulate. ... (09 Oct 1997) ...

sinuatrial
Synonym for sinoatrial ... <anatomy> Relating to the sinus venosus and the right atrium of the heart. ... Synonym: sinuatrial. ... (20 Jun 2000) ...

sinuatrial chamber
Synonym for sinoatrial chamber ... <anatomy> The common chamber formed by the single embryonic atrium and the right and left horns of the sinus venosus. ... (20 Jun 2000) ...

sinuatrial nodal artery
Synonym for sinoatrial nodal artery ... <anatomy, artery> A branch usually of the right coronary artery that supplies the sinuatrial node. ... Synonym: sinus node artery. ... (05 Mar 2000) ...

sinus
<anatomy> A notch, depression or cavity on the surface of an organ. ... (09 Oct 1997) ...

sinus alae parvae
Synonym for sphenoparietal sinus ... A paired dural venous sinus beginning on the parietal bone, running along the sphenoidal ridges and emptying into the cavernous sinus. ... Synonym: sinus sphenoparietalis, Breschet's sinus, sinus alae parvae. ... (05 Mar 2000) ...

sinus anales
Synonym for anal sinuses ... The grooves between the anal columns. ... Synonym: Morgagni's sinus. ... Pockets or crypts in the columnar zone of the anal canal between the anocutaneous line and the anorectal line; the sinuses give the mucosa a scalloped appearance. ... Synonym: sinus anales, anal crypts, Morgagni's crypts, rectal sinuses. ... (05 Mar 200 …

sinus aortae
Synonym for aortic sinus ... The space between the superior aspect of each cusp of the aortic valve and the dilated portion of the wall of the ascending aorta, immediately above each cusp. ... Synonym: sinus aortae, Petit's sinus, Valsalva's sinus. ... Arlt's sinus, an inconstant depression on the lower portion of the internal surface of the lacrimal …

sinus arrest
<cardiology, physiology> Cessation of sinus activity; the ventricles may continue to beat under ectopic atrial, atrioventricular junctional, or idioventricular control. ... See: sinus standstill, atrial standstill. ... (05 Mar 2000) ...

sinus arrhythmia
<cardiology, physiology> An increase in heart rate during inspiration. A normal physiologic response, more pronounced in children. ... (27 Sep 1997) ...

sinus barotrauma
Sinus troubles, particulaqrly with pain, due to changing atmospheric pressures, as when going up or down in a plane. Also called aerosinusitis or barosinusitis. ... (12 Dec 1998) ...

sinus bradycardia
<cardiology, physiology> Bradycardia originating in the normal sinus pacemaker. ... (05 Mar 2000) ...

sinus caroticus
Synonym for carotid sinus ... <anatomy> A slight dilation in the carotid artery at its bifurcation into the external and internal carotid arteries, it contains baroreceptors (pressure sensors) that when stimulated, will cause a reflex slowing of the heart, vasodilation and a fall in blood pressure. ... (27 Sep 1997) ...

sinus cavernosus
Synonym for cavernous sinus ... <radiology> Contents: III oculomotor n., IV trochlear n., V-1 ophthalmic n. (trigeminal n.), V-2 maxillary n. (trigeminal n.), VI abducens n. Note: mandibular n. (V-3) passes through foramen rotundum ... (12 Dec 1998) ...

sinus circularis
sinus venosus sclerae ...

sinus coronarius
Synonym for coronary sinus ... A short trunk receiving most of the cardiac veins, beginning at the junction of the great cardiac vein and the oblique vein of the left atrium, running in the posterior part of the coronary sulcus and emptying into the right atrium between the inferior vena cava and the atrioventricular orifice. ... Synonym: sinus coron …

sinus durae matris
Synonym for dural venous sinuses ... Endothelium-lined venous channels in the dura mater. ... Synonym: sinus durae matris, cerebral sinuses, cranial sinuses, sinuses of dura mater, venous sinuses. ... (05 Mar 2000) ...

sinus epididymidis
Synonym for sinus of epididymis ... A narrow space between the body of the epididymis and the testis. ... Synonym: sinus epididymidis. ... Ethmoidal sinuses, ethmoidal air-cells; evaginations of the mucous membrane of the middle and superior meatuses of the nasal cavity into the ethmoidal labyrinth forming multiple small paranasal sinuses; they are su …

sinus ethmoidales
Synonym for ethmoid air cells ... The numerous small air-filled cells of the ethmoidal labyrinth. ... See: anterior ethmoidal air cells, middle ethmoidal air cells, posterior ethmoidal air cells. ... Synonym: cellulae ethmoidales, sinus ethmoidales, ethmoidal cells. ... (05 Mar 2000) ...

sinus ethmoidales anteriores
Synonym for anterior ethmoidal air cells ... The anterior group of air cells of the ethmoidal sinus's; each sinus communicates with the middle meatus of the nasal cavity. ... Synonym: sinus ethmoidales anteriores, anterior cells, anterior sinuses, cellulae anteriores. ... (05 Mar 2000) ...

sinus ethmoidales mediae
Synonym for middle ethmoidal air cells ... The middle group of air cells of the ethmoidal sinus's; each sinus communicates with the middle meatus of the nasal cavity. ... Synonym: sinus ethmoidales mediae, cellulae mediae, middle cells, middle ethmoidal sinuses. ... (05 Mar 2000) ...

sinus ethmoidales posteriores
Synonym for posterior ethmoidal air cells ... The posterior group of air cells of the ethmoidal sinus's; each sinus communicates with the superior meatus of the nasal cavity. ... Synonym: sinus ethmoidales posteriores, cellulae posteriores, posterior cells. ... (05 Mar 2000) ...

sinus frontalis
Synonym for frontal sinus ... One of the paired, but seldom symmetrical, air spaces located between the inner and outer compact layers of the frontal bone. ... (12 Dec 1998) ...

sinus histiocytosis
Synonym for histiocytosis ... A condition marked by the abnormal appearance of histiocytes (macrophages) in the blood. Lipid h., Niemann-Pick disease. Sinus h., a disorder of the lymph nodes in which the distended sinuses are completely or nearly completely, filled by histiocytes, as a result of active multiplication of the littoral cells. H. X, a g …

sinus intercavernosi
Synonym for intercavernous sinuses ... The anterior and posterior anastomoses between the cavernous sinus's, passing anterior and posterior to the hypophysis and forming, with the cavernous sinuses, the circular sinus. ... Synonym: sinus intercavernosi, Ridley's sinus. ... Jugular sinus ... Sinus jugularis, one of three enlargements of the jugular vein …

sinus lactiferi
Synonym for lactiferous sinus ... A circumscribed spindle-shaped dilation of the lactiferous duct just before it enters the nipple. In nursing mothers this dilatation stores a droplet of milk which is expressed by compression as the infant begins to suckle; this is thought to encourage continual suckling while the let-down reflex ensues. ... Synonym: …

sinus laryngeus
Synonym for laryngeal ventricle ... The recess in each lateral wall of the larynx between the vestibular and vocal folds and into which the layrngeal sacculus opens. ... Synonym: ventriculus laryngis, laryngeal sinus, Morgagni's sinus, Morgagni's ventricle, sinus laryngeus. ... (05 Mar 2000) ...

sinus lienis
Synonym for splenic sinus ... An elongated venous channel, 12 to 40 um wide, lined by rod-shaped cells. ... Synonym: sinus lienis. ... Straight sinus, an unpaired dural venous sinus in the posterior part of the falx cerebri where it is attached to the tentorium cerebelli; it is formed anteriorly by the merging of the great cerebral vein with the infer …

sinus maxillaris
Synonym for maxillary sinus ... A air filled cavity within the maxilla (bone that forms the face and upper jaw). The maxillary sinus is located just below the bony prominence of the cheek ... (27 Sep 1997) ...

sinus nerve of Hering
Synonym for carotid sinus nerve ... <anatomy, nerve> A branch of the glossopharyngeal nerve that innervates the baroreceptors in the wall of the carotid sinus and the chemoreceptors in the carotid body. ... Synonym: ramus sinus carotici, carotid sinus branch, Hering's sinus nerve, intercarotid nerve, nerve to carotid sinus, sinus nerve of Herin …

sinus node
Synonym for sinuatrial node ... sinoatrial node ...

sinus node artery
Synonym for sinoatrial nodal artery ... <anatomy, artery> A branch usually of the right coronary artery that supplies the sinuatrial node. ... Synonym: sinus node artery. ... (05 Mar 2000) ...

sinus obliquus pericardii
Synonym for oblique pericardial sinus ... The recess in the pericardial cavity posterior to the base of the heart bounded laterally by the pericardial reflections on the pulmonary veins and inferior vena cava, and posteriorly by the pericardium overlying the anterior aspect of the oesophagus. ... Synonym: sinus obliquus pericardii, oblique sinus of p …

sinus occipitalis
Synonym for occipital sinus ... An unpaired dural venous sinus commencing at the confluence of the sinuses and passing downward in the base of the falx cerebelli to the foramen magnum. ... Synonym: sinus occipitalis. ... (05 Mar 2000) ...

sinus of epididymis
A narrow space between the body of the epididymis and the testis. ... Synonym: sinus epididymidis. ... Ethmoidal sinuses, ethmoidal air-cells; evaginations of the mucous membrane of the middle and superior meatuses of the nasal cavity into the ethmoidal labyrinth forming multiple small paranasal sinuses; they are subdivided into anterior, middle and …

sinus of nail
sinus unguis ...

sinus of the vena cava
The portion of the cavity of the right atrium of the heart that receives the blood from the venae cavae; it is separated from the rest of the atrium by the crista terminalis. ... Synonym: sinus venarum cavarum. ... (05 Mar 2000) ...

sinus of valsalva
The dilatation of the aortic wall behind each of the cusps of the aortic valve. ... (12 Dec 1998) ...

sinus paranasales
Synonym for paranasal sinuses ... Air-filled extensions of the respiratory part of the nasal cavity into the frontal, ethmoid, sphenoid, and maxillary cranial bones. They vary in size and form in different individuals and are lined by the ciliated mucous membranes of the nasal cavity. ... (12 Dec 1998) ...

sinus pause
A spontaneous interruption in the regular sinus rhythm, the pause lasting for a period that is not an exact multiple of the sinus cycle. ... See: sinus arrest, sinus standstill. ... (05 Mar 2000) ...

sinus petrosus inferior
Synonym for inferior petrosal sinus ... A paired dural venous sinus running in the groove on the petrooccipital fissure connecting the cavernous sinus with the superior bulb of the internal jugular vein. ... Synonym: sinus petrosus inferior, Englisch's sinus. ... (05 Mar 2000) ...

sinus petrosus superior
Synonym for superior petrosal sinus ... A paired dural venous sinus in the groove along the crest of the petrous temporal bone, connecting the cavernous sinus with the termination of the transverse sinus or beginning of the sigmoid sinus. ... Synonym: sinus petrosus superior. ... (05 Mar 2000) ...

sinus phlebitis
Inflammation of a cerebral sinus. ... (05 Mar 2000) ...

sinus pocularis
Synonym for prostatic utricle ... A minute pouch in the prostate opening on the summit of the seminal colliculus, the analogue of the uterus and vagina in the female, being the remains of the fused caudal ends of the paramesonephric ducts. ... Synonym: utriculus prostaticus, masculine uterus, Morgagni's sinus, sinus pocularis, uterus masculinus, vagi …

sinus posterior
A deep groove above the pyramidal eminence extending to the incudal fossa in the posterior wall of the tympanic cavity. ... (05 Mar 2000) ...

sinus prostaticus
Synonym for prostatic sinus ... The groove on either side of the urethral crest in the prostatic part of the urethra into which the prostatic ducts open. ... Synonym: sinus prostaticus. ... (05 Mar 2000) ...

sinus rectus
straight sinus ...

sinus reflex
See: carotid sinus syndrome. ... (05 Mar 2000) ...

sinus renalis
Synonym for renal sinus ... The cavity of the kidney, containing the calyces and pelvis of the ureter and the segmental vesels embedded within a fatty matrix. The renal sinuses cause the kidneys to appear hollow or C-shaped on cross section or medical imaging. ... Synonym: sinus renalis. ... (05 Mar 2000) ...

sinus reuniens
An obsolete term for sinus venosus. ... Rhomboidal sinus ... Sinus rhomboidalis, a dilation of the central canal of the spinal cord in the lumbar region. ... Synonym: rhombocele. ... (05 Mar 2000) ...

sinus rhythm
The normal regular cardiac rhythm stimulated by the sinoatrial node. ... (27 Sep 1997) ...

sinus sagittalis inferior
Synonym for inferior sagittal sinus ... An unpaired dural venous sinus in the lower margin of the falx cerebri, running parallel to the superior sagittal sinus and merging with the great cerebral vein to form the the straight sinus. ... Synonym: sinus sagittalis inferior, inferior longitudinal sinus. ... (05 Mar 2000) ...

sinus sagittalis superior
Synonym for superior sagittal sinus ... An unpaired dural venous sinus in the sagittal groove, beginning at the foramen caecum and terminating at the confluence of sinuses where it merges with the straight sinus; receives the superior cerebral veins and has lateral extensions, the lateral venous lacunae. ... Synonym: sinus sagittalis superior, superi …

sinus septum
A small fold forming the medial end of the valve of the inferior vena cava; it is developed from the dorsal wall of the embryonic sinus venosus. ... (05 Mar 2000) ...

sinus sigmoideus
Synonym for sigmoid sinus ... The S-shaped dural venous sinus lying deep to the mastoid process of the temporal bone and immediately posterior to the petrous temporal bone; it is continuous with the transverse sinus and empties into the internal jugular vein as it passes through the jugular foramen. ... Synonym: sinus sigmoideus. ... (05 Mar 2000) ...

sinus sphenoidalis
Synonym for sphenoidal sinus ... One of a pair of paranasal sinuses in the body of the sphenoid bone communicating with the upper posterior nasal cavity or spenoethmoidal recess. ... Synonym: sinus sphenoidalis. ... (05 Mar 2000) ...

sinus sphenoparietalis
Synonym for sphenoparietal sinus ... A paired dural venous sinus beginning on the parietal bone, running along the sphenoidal ridges and emptying into the cavernous sinus. ... Synonym: sinus sphenoparietalis, Breschet's sinus, sinus alae parvae. ... (05 Mar 2000) ...

sinus standstill
Cessation of sinus node activity, marked by absence of normal P waves in the electrocardiogram. ... Ventricular standstill, cessation of ventricular contractions, marked by absence of ventricular complexes in the electrocardiogram. ... (05 Mar 2000) ...

sinus tachycardia
A fast heartbeat (tachycardia) occurring because of rapid firing by the sa node, the natural pacemaker of the heart. Electrical signals initiated in the sa node are transmitted to the atria and the ventricles to stimulate heart muscle contractions heartbeats. Sinus tachycardia is usually a rapid contraction of a normal heart in response to a condit …

sinus tarsi
tarsal sinus ...

sinus thrombosis
Formation of a clot in a cerebral venous sinus. ... (12 Dec 1998) ...

sinus tonsillaris
Synonym for tonsillar fossa ... The depression between the palatoglossal and palatopharyngeal arches occupied by the palatine tonsil. ... Synonym: fossa tonsillaris, amygdaloid fossa, sinus tonsillaris. ... (05 Mar 2000) ...

sinus transversus
Synonym for transverse sinus ... A paired dural venous sinus that drains the confluence of sinuses, running along the occipital attachment of the tentorium cerebelli and terminating in the sigmoid sinus. ... Synonym: sinus transversus, lateral sinus. ... Transverse pericardial sinus, a passage in the pericardial sac between the origins of the great ve …

sinus transversus pericardii
transverse pericardial sinus ...

sinus trunci pulmonalis
Synonym for pulmonary sinuses ... The space at the origin of the pulmonary trunk between the dilated wall of the vessel and each cusp of the pulmonic valve. ... Synonym: sinus trunci pulmonalis. ... (05 Mar 2000) ...

sinus tubercle
Synonym for Muller's tubercle ... A median protuberance projecting into the embryonic urogenital sinus from its dorsal wall; it is formed from the fused caudal ends of the paramesonephric ducts and is the first evidence of the embryonic uterus and vagina. ... Synonym: sinus tubercle. ... (05 Mar 2000) ...

sinus tympani
Synonym for tympanic sinus ... A depression in the tympanic cavity posterior to the tympanic promontory. ... Synonym: sinus tympani. ... Sinus unguis, the deep cleft housing the root of the nail. ... Synonym: sinus of nail. ... (05 Mar 2000) ...

sinus urogenitalis
Synonym for persistent cloaca ... A condition in which the urorectal fold has failed to divide the cloaca of the embryo into rectal and urogenital portions. ... Synonym: sinus urogenitalis, urogenital sinus. ... (05 Mar 2000) ...

sinus venarum cavarum
Synonym for sinus of the vena cava ... The portion of the cavity of the right atrium of the heart that receives the blood from the venae cavae; it is separated from the rest of the atrium by the crista terminalis. ... Synonym: sinus venarum cavarum. ... (05 Mar 2000) ...

sinus venosus
A cavity at the caudal end of the embryonic cardiac tube in which the veins from the intra-and extraembryonic circulatory arcs unite; in the course of development it forms the portion of the right atrium known in adult anatomy as the sinus of the vena cava. ... Synonym: saccus reuniens. ... Sinus venosus sclerae, the vascular structure encircling the …

sinus venosus syndrome
<syndrome> The association of partial anomalous, pulmonary-venous connection, and a small venosus ASD. ... (05 Mar 2000) ...

sinus vertebrales longitudinales
longitudinal vertebral venous sinus ...

sinusal
<anatomy> Pertaining to the sinus. ... (18 Nov 1997) ...

sinuses
Air filled cavities. ... Examples are the ethmoids, maxillary, frontal and sphenoid sinuses. ... (27 Sep 1997) ...

sinuses of dura mater
Synonym for dural venous sinuses ... Endothelium-lined venous channels in the dura mater. ... Synonym: sinus durae matris, cerebral sinuses, cranial sinuses, sinuses of dura mater, venous sinuses. ... (05 Mar 2000) ...

sinusitis
<pathology> Inflammation of a sinus. The condition may be purulent or nonpurulent, acute or chronic. Depending on the site of involvement it is known as ethmoid, frontal, maxillary or sphenoid sinusitis. ... (18 Nov 1997) ...

sinusotomy
<procedure> Incision into a sinus. ... Origin: sinus + G. Tome, incision ... (05 Mar 2000) ...

sinuvertebral nerves
Synonym for meningeal branch of spinal nerves ... A branch from the initial (mixed) part of each spinal nerve passing in a recurrent fashion back through the intervertebral foramen to supply spinal meninges, the posterior longitudinal ligament, posterolateral periphery of the intervertebral disc, and periosteum of the vertebrae. ... Synonym: ramus me …

SIP
See State Implementation Plan. ... (05 Dec 1998) ...

siphon
1. A device, consisting of a pipe or tube bent so as to form two branches or legs of unequal length, by which a liquid can be transferred to a lower level, as from one vessel to another, over an intermediate elevation, by the action of the pressure of the atmosphere in forcing the liquid up the shorter branch of the pipe immersed in it, while the c …

Siphona irritans
The horn fly, a bloodsucking muscoid fly that causes great irritation and annoyance to cattle, and transmits Stephanofilaria stilesi. ... Origin: G. Siphon, tube ... (05 Mar 2000) ...

siphonage
Emptying of the stomach or other cavity by means of a siphon. ... (05 Mar 2000) ...

Siphonaptera
The fleas, an order of wingless insect ectoparasites highly adapted for survival in mammalian fur; they are flattened laterally, spined, and equipped with well-developed metathoracic legs for jumping. ... Origin: G. Siphon, tube, + G. A-priv. + pteron, wing ... (05 Mar 2000) ...