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

spermatozoid
<biology> The male germ cell in animals and plants, the essential element in fertilization; a microscopic animalcule-like particle, usually provided with one or more cilia by which it is capable of active motion. In animals, the familiar type is that of a small, more or less ovoid head, with a delicate threadlike cilium, or tail. Called also …

spermatozoon
Mature sperm cell (male gamete). ... (18 Nov 1997) ...

spermaturia
Synonym for semenuria ... <urology> The excretion of urine containing semen. ... Synonym: seminuria, spermaturia. ... (05 Mar 2000) ...

spermia
Plural of spermium. ... (05 Mar 2000) ...

spermicidal
Synonym for spermatocidal ... Destructive to spermatozoa. ... Synonym: spermicidal. ... (05 Mar 2000) ...

spermicide
<pharmacology> An agent that is destructive to spermatozoa. ... (18 Nov 1997) ...

spermidine
<biochemistry> A polybasic amine. ... See: spermine. ... (18 Nov 1997) ...

spermidine acetylase
<enzyme> Froms monoacetylspermidine from acetyl-CoA and spermidine ... Registry number: EC 2.3.1.- ... (26 Jun 1999) ...

spermidine acetyltransferase
<enzyme> Involved in conversion of spermidine into putrescine; csat refers to n1-acetyltransferse; nsat refers to n8-acetyltransferase ... Registry number: EC 2.3.1.57 ... Synonym: spermidine-spermine n(1)-acetyltransferase, diamine acetyltransferase, csat transferase, nsat transferase, spermidine n(8)-acetyltransferase, spermidine n1-acetyltra …

spermidine synthase
<enzyme> An enzyme that catalyses the transfer of the propylamine moiety from 5'-deoxy-5'-s-(3-methylthiopropylamine)sulfonium adenosine to putrescine in the biosynthesis of spermidine. The enzyme has a molecular weight of approximately 73,000 kD and is composed of two subunits of equal size. ... Chemical name: S-Adenosylmethioninamine:putresc …

spermiduct
Synonym: ductus deferens. ... Synonym: ejaculatory duct. ... (05 Mar 2000) ...

spermine
<biochemistry> Polybasic amine. Found in human sperm, in ribosomes and in some viruses. Involved in nucleic acid packaging. Synthesis is regulated by ornithine decarboxylase which plays a key role in control of DNA replication. ... (18 Nov 1997) ...

spermine synthase
<enzyme> An enzyme that catalyses the transfer of the propylamine moiety from 5'-deoxy-5'-s-(3-methylthiopropylamine)sulfonium adenosine to spermidine in the biosynthesis of spermine. It has an acidic isoelectric point at pH 5.0. ... Chemical name: S-Adenosylmethioninamine:spermidine 3-aminopropyltransferase ... Registry number: EC 2.5.1.22 ... …

spermiogenesis
That segment of spermatogenesis during which immature spermatids become spermatozoa. ... Origin: sperm-+ G. Genesis, origin ... (05 Mar 2000) ...

spermism
The belief by preformationists that the male sex cell (sperm) contains a miniature preformed body called the homunculus. ... (05 Mar 2000) ...

spermium
H.W.G. Waldeyer's term for the mature male germ cell or spermatozoon. ... (05 Mar 2000) ...

spermo-
<prefix> Combining forms from the Greek seed, sperm, semen (of plants or animals); as, spermatoblast, spermoblast. ... (29 Oct 1998) ...

spermolith
A concretion in the ductus deferens. ... Origin: spermo-+ G. Lithos, stone ... (05 Mar 2000) ...

spermolysis
Synonym for spermatolysis ... Destruction, with dissolution, of the spermatozoa. ... Synonym: spermolysis. ... Origin: spermato-+ G. Lysis, dissolution ... (05 Mar 2000) ...

spermotoxin
Synonym for spermatoxin ... A cytotoxic antibody specific for spermatozoa. ... Synonym: spermotoxin. ... (05 Mar 2000) ...

spew
1. To eject from the stomach; to vomit. ... 2. To eject seed, as wet land swollen with frost. ... 3. To cast forth with abhorrence or disgust; to eject. 'Because thou art lukewarm, and neither hot nor cold, I will spew thee out of my mouth.' (Rev. Ii. 16) ... Origin: OE. Spewen, speowen, AS. Spiwan;n to D. Spuwen to spit. OS & OHG. Spiwan, G. Spei …

SPF
<abbreviation> Sun protection factor. ... (05 Mar 2000) ...

sphacelism
The condition manifested by a sphacelus. ... (05 Mar 2000) ...

sphaceloderma
Gangrene of the skin. ... Origin: G. Sphakelos, gangrene, + derma, skin ... (05 Mar 2000) ...

sphacelous
Sloughing, gangrenous, or necrotic. ... (05 Mar 2000) ...

sphaeriales
An order of ascomycetous fungi which includes many economically important plant parasites as well as saprophytes. ... (12 Dec 1998) ...

sphaeridium
<marine biology, zoology> A peculiar sense organ found upon the exterior of most kinds of sea urchins, and consisting of an oval or sherical head surmounting a short pedicel. It is generally supposed to be an olfactory organ. ... Origin: NL, fr. Gr. A sphere. ... (20 Mar 1998) ...

sphagnum moss
A highly absorbent moss used as a substitute for absorbent cotton or gauze in surgical dressing and sanitary napkins. ... Synonym: muskeag moss, peat moss. ... (05 Mar 2000) ...

sphenethmoid
<anatomy> Of or pertaining to both the sphenoidal and the ethmoidal regions of the skull, or the sphenethmoid bone. ... <zoology> Sphenethmoid bone, a bone of the skull which surrounds the anterior end of the brain in many amphibia; the girdle bone. ... Origin: Sphenoid + ethmoid. ... (20 Mar 1998) ...

sphenion
The tip of the sphenoidal angle of the parietal bone; a craniometric point. ... Origin: Mod. L. Fr. G. Sphen, wedge, + dim. -ion ... (05 Mar 2000) ...

spheno-
<anatomy, prefix> A combining form used in anatomy to indicate connection with, or relation to, the sphenoid bone; as in sphenomaxillary, sphenopalatine. ... (29 Oct 1998) ...

spheno-occipital
Synonym for sphenobasilar ... Relating to the sphenoid bone and the basilar process of the occipital bone. ... Synonym: spheno-occipital, sphenoccipital. ... (05 Mar 2000) ...

spheno-occipital joint
Synonym for spheno-occipital synchondrosis ... Cartilaginous union between the body of the sphenoid and the basilar portion of the occipital; it fuses by the twentieth year; incorrectly called spheno-occipital suture. ... Synonym: synchondrosis spheno-occipitalis, spheno-occipital joint, spheno-occipital suture. ... (05 Mar 2000) ...

spheno-occipital suture
Synonym for spheno-occipital synchondrosis ... Cartilaginous union between the body of the sphenoid and the basilar portion of the occipital; it fuses by the twentieth year; incorrectly called spheno-occipital suture. ... Synonym: synchondrosis spheno-occipitalis, spheno-occipital joint, spheno-occipital suture. ... (05 Mar 2000) ...

spheno-occipital synchondrosis
Cartilaginous union between the body of the sphenoid and the basilar portion of the occipital; it fuses by the twentieth year; incorrectly called spheno-occipital suture. ... Synonym: synchondrosis spheno-occipitalis, spheno-occipital joint, spheno-occipital suture. ... (05 Mar 2000) ...

spheno-orbital suture
Articulation between the orbital process of the palatine bone and the outer surface of the body of the sphenoid. ... Synonym: sutura spheno-orbitalis. ... (05 Mar 2000) ...

sphenobasilar
Relating to the sphenoid bone and the basilar process of the occipital bone. ... Synonym: spheno-occipital, sphenoccipital. ... (05 Mar 2000) ...

sphenoccipital
Synonym for sphenobasilar ... Relating to the sphenoid bone and the basilar process of the occipital bone. ... Synonym: spheno-occipital, sphenoccipital. ... (05 Mar 2000) ...

sphenocephaly
Condition characterised by a deformation of the skull giving it a wedge-shaped appearance. ... Origin: spheno-+ G. Kephale, head ... (05 Mar 2000) ...

sphenoethmoid
Relating to the sphenoid and ethmoid bones. ... Synonym: sphenethmoid. ... (05 Mar 2000) ...

sphenoethmoidal recess
A small cleftlike pocket of the nasal cavity above the superior concha into which the sphenoid sinuses drain. ... Synonym: recessus sphenoethmoidalis. ... (05 Mar 2000) ...

sphenoethmoidal suture
Line of union between the crest of the sphenoid bone and the perpendicular and cribriform plates of the ethmoid. ... Synonym: sutura sphenoethmoidalis. ... (05 Mar 2000) ...

sphenoethmoidal synchondrosis
Cartilaginous union between the body of the sphenoid and the posterior part of the ethmoidal labyrinth. ... Synonym: synchondrosis sphenoethmoidalis. ... (05 Mar 2000) ...

sphenofrontal
Relating to the sphenoid and frontal bones. ... (05 Mar 2000) ...

sphenofrontal suture
Line of union between the orbital plate of the frontal and the lesser wings of the sphenoid on either side. ... Synonym: sutura sphenofrontalis. ... (05 Mar 2000) ...

sphenoid
1. Wedge-shaped; as, a sphenoid crystal. ... 2. <anatomy> Of or pertaining to the sphenoid bone. ... <anatomy> Sphenoid bone, an irregularly shaped bone in front of the occipital in the base of the skull of the higher vertebrates. It is composed of several foetal bones which become united the adult. See Alisphenoid, Basisphenoid, Orbitosp …

sphenoid bone
A bone of most irregular shape occupying the base of the skull; it is described as consisting of a central portion, or body, and six processes: two greater wings, two lesser wings and two pterygoid processes; it articulates with the occipital, frontal, ethmoid, and vomer, and with the paired temporal, parietal, zygomatic, palatine and sphenoidal co …

sphenoid crest
A vertical ridge in the midline of the anterior surface of the sphenoid bone that articulates with the perpendicular plate of the ethmoid bone. ... Synonym: crista sphenoidalis. ... (05 Mar 2000) ...

sphenoid process
Synonym for sphenoid process of palatine bone ... The posterior and smaller of the two processes at the extremity of the vertical plate of the palatine bone; processus sphenoidalis cartilaginis septi nasi, processus posterior cartilaginis septi nasi. ... Synonym: processus sphenoidalis, sphenoid process. ... (05 Mar 2000) ...

sphenoid process of palatine bone
The posterior and smaller of the two processes at the extremity of the vertical plate of the palatine bone; processus sphenoidalis cartilaginis septi nasi, processus posterior cartilaginis septi nasi. ... Synonym: processus sphenoidalis, sphenoid process. ... (05 Mar 2000) ...

sphenoid sinusitis
Inflammation of the sphenoid sinus. This condition usually is accompanied by pansinusitis and may present itself in an acute or chronic form. ... (12 Dec 1998) ...

sphenoidal angle
Angle formed by the intersection at the top of the sella turcica (dorsum sellae), of lines coming from the nasal point and from the tip of the rostrum of the sphenoid. ... Synonym: sphenoidal angle of parietal bone. ... (05 Mar 2000) ...

sphenoidal angle of parietal bone
The anterior inferior angle of the parietal bone. ... Synonym: angulus sphenoidalis ossis parietalis, sphenoid angle, sphenoidal angle, Welcker's angle. ... (05 Mar 2000) ...

sphenoidal border of temporal bone
The part of the border of the squamous part of the temporal bone that articulates with the greater wing of the sphenoid. ... Synonym: margo sphenoidalis ossis temporalis. ... (05 Mar 2000) ...

sphenoidal conchae
Paired ossicles of pyramidal shape, the spines of which are in contact with the medial pterygoid lamina, the bases forming the roof of the nasal cavity. ... Synonym: conchae sphenoidales, Bertin's bones, Bertin's ossicles, sphenoidal turbinated bones. ... (05 Mar 2000) ...

sphenoidal fissure
Synonym for superior orbital fissure ... A cleft between the greater and the lesser wings of the sphenoid establishing a channel of communication between the middle cranial fossa and the orbit, through which pass the oculomotor and trochlear nerves, the ophthalmic division of the trigeminal nerve, the abducens nerve, and the ophthalmic veins. ... Syn …

sphenoidal fontanel
An irregularly shaped interval on either side where the frontal, sphenoidal angle of the parietal, squamous portion of the temporal and greater wing of the sphenoid meet. ... Synonym: fonticulus sphenoidalis, fonticulus anterolateralis, anterolateral fontanel. ... (05 Mar 2000) ...

sphenoidal herniation
Displacement of ventral frontal lobar tissue over the sphenoid ridge. ... (05 Mar 2000) ...

sphenoidal ridges
Sharp posterior margins of the lesser wings of the sphenoid bone which end medially in the anterior clinoid process; the sphenoidal ridges demarcate the anterior cranial fossa from the lateral part of the middle cranial fossa. ... (05 Mar 2000) ...

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) ...

sphenoidal sinus aperture
Synonym for opening of the sphenoidal sinus ... One of the pair of openings in the body of the sphenoid bone through which the sphenoid sinuses communicate with the sphenoethmoidal recess of the nasal cavity. ... Synonym: apertura sinus sphenoidalis, sphenoidal sinus aperture. ... (05 Mar 2000) ...

sphenoidal spine
A posterior and downward projection from the greater wing of the sphenoid bone on either side, located posterolateral to the foramen spinosum, so-named for its proximity to the sphenoidal spine; gives attachment to the sphenomandibular ligament. ... Synonym: processus spinosus, spina ossis sphenoidalis, alar spine, angular spine, spina angularis, sp …

sphenoidal turbinated bones
Synonym for sphenoidal conchae ... Paired ossicles of pyramidal shape, the spines of which are in contact with the medial pterygoid lamina, the bases forming the roof of the nasal cavity. ... Synonym: conchae sphenoidales, Bertin's bones, Bertin's ossicles, sphenoidal turbinated bones. ... (05 Mar 2000) ...

sphenoidale
The point of greatest convexity between the anterior contour of the sella turcica and the jugum sphenoidale. ... (05 Mar 2000) ...

sphenoiditis
1. Inflammation of the sphenoid sinus. ... 2. Necrosis of the sphenoid bone. ... Origin: sphenoid + G. -itis, inflammation ... (05 Mar 2000) ...

sphenoidostomy
<procedure> An operative opening made in the anterior wall of the sphenoid sinus. ... Origin: sphenoid + G. Stoma, mouth ... (05 Mar 2000) ...

sphenoidotomy
<procedure> Any operation on the sphenoid bone or sinus. ... Origin: sphenoid + G. Tome, a cutting ... (05 Mar 2000) ...

sphenomalar
Synonym for sphenozygomatic ... Relating to the sphenoid and the zygomatic bones. ... Synonym: sphenomalar. ... (05 Mar 2000) ...

sphenomandibular ligament
<anatomy> The fibrous band that passes from the spine of the sphenoid bone to the lingula of the mandible; it is a primary passive support of the mandible serving as a 'swinging axis', enabling depression and elevation around a transverse axis passing through the two lingulae, while at the same time enabling protraction and retraction. ... Syn …

sphenomaxillary
Relating to the sphenoid bone and the maxilla. ... (05 Mar 2000) ...

sphenomaxillary fissure
Synonym for inferior orbital fissure ... A cleft between the greater wing of the sphenoid and the orbital plate of the maxilla, through which pass the maxillary division and the orbital branch of the trigeminal nerve, fibres from the pterygopalatine (Meckel's) ganglion, and the infraorbital vessels. ... Synonym: fissura orbitalis inferior, sphenomaxi …

sphenomaxillary fossa
Synonym for pterygopalatine fossa ... Sphenomaxillary fossa, a small pyramidal space, housing the pterygopalatine ganglion, between the pterygoid process, the maxilla, and the palatine bone. ... Synonym: fossa pterygopalatina, Bichat's fossa, pterygomaxillary fossa, sphenomaxillary fossa. ... (05 Mar 2000) ...

sphenomaxillary suture
An inconstant suture between the pterygoid process of the sphenoid bone and the body of the maxilla. ... Synonym: sutura sphenomaxillaris. ... (05 Mar 2000) ...

sphenopalatine
Relating to the sphenoid and the palatine bones. ... (05 Mar 2000) ...

sphenopalatine artery
<anatomy, artery> Origin, third part of maxillary; distribution, posterior portion of lateral nasal wall and septum; anastomoses, branches of descending palatine, superior labial, and infraorbital. ... Synonym: arteria sphenopalatina. ... (05 Mar 2000) ...

sphenopalatine foramen
The foramen formed from the sphenopalatine notch of the palatine bone in articulation with the sphenoid bone; it transmits the sphenopalatine artery and accompanying nerves. ... Synonym: foramen sphenopalatinum. ... (05 Mar 2000) ...

sphenopalatine ganglion
Synonym for pterygopalatine ganglion ... A small parasympathetic ganglion in the upper part of the pterygopalatine fossa whose postsynaptic fibres supply the lacrimal, nasal, palatine and pharyngeal glands. ... Synonym: ganglion pterygopalatinum, Meckel's ganglion, nasal ganglion, sphenopalatine ganglion. ... (05 Mar 2000) ...

sphenopalatine neuralgia
Neuralgia of the lower half of the face, with pain referred to the root of the nose, upper teeth, eyes, ears, mastoid, and occiput, in association with nasal congestion and rhinorrhoea occurring in infection of the nasal sinuses, and produced by lesions of the sphenopalatine ganglion; ocular hyperaemia and excessive lacrimation may occur. ... Synony …

sphenopalatine notch
The deep notch between the orbital and sphenoidal processes of the palatine bone which is converted into the foramen of the same name by the undersurface of the sphenoid bone. ... Synonym: incisura sphenopalatina. ... (05 Mar 2000) ...

sphenoparietal
Relating to the sphenoid and the parietal bones. ... (05 Mar 2000) ...

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) ...

sphenoparietal suture
Line of union of the lower border of the parietal with the upper edge of the greater wing of the sphenoid. ... Synonym: sutura sphenoparietalis. ... (05 Mar 2000) ...

sphenopetrosal
Relating to the sphenoid bone and the petrous portion of the temporal bone. ... (05 Mar 2000) ...

sphenopetrosal fissure
A narrow fissure between the undersurface of the greater wing of the sphenoid and the petrous portion of the temporal bone. ... Synonym: fissura sphenopetrosa. ... (05 Mar 2000) ...

sphenopetrosal synchondrosis
Sphenopetrous synchondrosis, fibrocartilage filling the sphenopetrosal fissure. ... Synonym: synchondrosis sphenopetrosa. ... (05 Mar 2000) ...

sphenorbital
Denoting the portions of the sphenoid bone contributing to the orbits. ... (05 Mar 2000) ...

sphenosalpingostaphylinus
See: tensor veli palati muscle. ... Origin: L. ... (05 Mar 2000) ...

sphenosquamosal
Synonym for squamosphenoid ... Relating to the sphenoid bone and the squamous part of the temporal bone. ... Synonym: sphenosquamosal. ... (05 Mar 2000) ...

sphenosquamous suture
Articulation of the greater wing of the sphenoid with the squamous portion of the temporal bone. ... Synonym: sutura sphenosquamosa. ... (05 Mar 2000) ...

sphenotemporal
Relating to the sphenoid and the temporal bones. ... (05 Mar 2000) ...

sphenotic centre
One of the paired centre's of ossification of the sphenoid bone. ... (05 Mar 2000) ...

sphenotic foramen
Synonym for foramen lacerum ... <anatomy> An irregular aperture, filled with cartilage (basilar cartilage) in the living, located between the apex of the petrous part of the temporal bone, the body of the sphenoid, and the basilar part of the occipital bones. Several structures pass along the margins of the foramen in a nearly horizontal direc …

sphenoturbinal
Denoting the concha sphenoidalis. ... (05 Mar 2000) ...

sphenovomerine
Relating to the sphenoid bone and the vomer. ... (05 Mar 2000) ...

sphenovomerine suture
The line of union of the vaginal process of the sphenoid with the wing of the vomer. ... Synonym: sutura sphenovomeriana. ... (05 Mar 2000) ...

sphenozygomatic
Relating to the sphenoid and the zygomatic bones. ... Synonym: sphenomalar. ... (05 Mar 2000) ...

sphenozygomatic suture
Junction of the zygomatic bone and greater wing of the sphenoid. ... Synonym: sutura sphenozygomatica. ... (05 Mar 2000) ...

spherator
<radiobiology> Single-ring multipole device with an additional current-carrying rod perpendicular to the ring axis. ... (09 Oct 1997) ...

sphere
1. <geometry> A body or space contained under a single surface, which in every part is equally distant from a point within called its center. ... 2. Hence, any globe or globular body, especially a celestial one, as the sun, a planet, or the earth. 'Of celestial bodies, first the sun, A mighty sphere, he framed.' (Milton) ... 3. <astronomy> …

spheresthesia
Rarely used term for globus hystericus. ... Origin: G. Sphaira, sphere, + aisthesis, sensation ... (05 Mar 2000) ...