Copy of `Dorland's Medical Dictionary`

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Dorland's Medical Dictionary Category: Health and Medicine > Medical Dictionary Date & country: 31/12/2010, USA Words: 39128

steeple sign
on a radiograph of the airway, an area of narrowing or obstruction above a wider area, sometimes seen in children with croup or epiglottitis.

Stein operation
an operation for reconstruction of the lower lip with flaps taken from the upper lip.

Stein test
(for disease of the labyrinth) inability to stand on one foot with the eyes shut indicates disease of the labyrinth.

Stein-Leventhal syndrome
(stīn´ lev´әn-thahl) polycystic ovary syndrome.

Steinbrocker syndrome
(stīn´brok-әr) shoulder-hand syndrome.

Steindler operation
(stīnd´lәr) surgical correction of pes cavus by stripping muscle and fascia from the plantar calcaneal surface.

Steiner syndrome
(shti´nәr) Curtius syndrome.

Steinert disease
(shti´nәrt) myotonia dystrophica.

Stelazine
(stel´ә-zēn) trademark for preparations of trifluoperazine hydrochloride, an antipsychotic agent.

stella
(stel´ә) Latin word meaning star. In anatomy, it is used to name a star-shaped structure.

stellate
(stel´āt) star-shaped; arranged in rosettes.

stellate block
stellate ganglion block regional anesthesia produced by blocking of the stellate (cervicothoracic) ganglion.

stellate cell
any star-shaped cell with filaments extending in all directions, such as a Kupffer cell or an astrocyte.

stellate fracture
one with a central point of injury, from which radiate numerous fissures.

stellate ganglion
cervicothoracic ganglion.

stellate veins of kidney
veins on the surface of the kidney that collect blood from the superficial parts of the renal cortex and empty into the interlobular veins.

stellectomy
(stә-lek´tә-me) excision of a portion of the stellate (cervicothoracic) ganglion.

Stellwag sign
a sign of Graves orbitopathy: infrequent and incomplete blinking accompanied by Dalrymple sign.

stem
(stem) a stalklike supporting structure; see also peduncle. brain stem brainstem. femoral stem in arthroplasty of the hip or knee, the part of the prosthesis that inserts into the end of the trimmed and prepared femur. humeral stem ...

stem cell
a type of undifferentiated cell with the ability to divide and proliferate to form precursor cells that can differentiate into more specialized cells.

stem cell leukemia
acute undifferentiated leukemia.

Stenger test
(for simulated unilateral hearing loss) a signal is presented at an intensity less than the admitted threshold to the affected ear, and a less intense signal of the same frequency is presented simultaneously to the unaffected ear. If the subject is feigning a loss of hearing, the signal in the unaffected ear will not be h...

stenocephaly
(sten″o-sef´ә-le) narrowness of the head or cranium. adj., stenoceph´alous., adj.

stenochoria
(sten″o-kor´e-ә) stenosis.

stenocoriasis
(sten″o-kә-ri´ә-sis) contraction of the pupil.

stenopeic
(sten″o-pe´ik) having a narrow opening or slit.

stenosed
(stә-nōzd´) narrowed; constricted.

stenosis
(stә-no´sis) pl. steno´ses an abnormal narrowing or contraction of a body passage or opening; called also arctation, coarctation, and stricture.

stenothermal
(sten″o-ther´mәl) stenothermic.

stenothermic
(sten″o-ther´mik) pertaining to or characterized by tolerance of only a narrow range of temperature.

stenothorax
(sten″o-thor´aks) abnormal narrowness of the chest.

stenotic
(stә-not´ik) marked by abnormal narrowing or constriction.

stent
(stent) a mold for keeping a skin graft in place, made of Stent mass or some acrylic or dental compound. by extension, a device or mold of a suitable material used to provide support for a tubular structure within the body that is being anastomosed. A stent inside a blood vessel maintains patency by scaffo...

steppage gait
the gait in footdrop in which the advancing leg is lifted high in order that the toes may clear the ground. It is due to paralysis of the anterior tibial and peroneal muscles, and is seen in lesions of the lower motor neuron, such as multiple neuritis, lesions of the anterior motor horn cells, and lesions of the cauda equ...

stepping reflex
movements of progression elicited when the infant is held upright and inclined forward with the soles of the feet touching a flat surface; seen in the normal infant until about the age of six weeks.

stercobilin
(stur″ko-bi´lin) a bile pigment derivative formed by air oxidation of stercobilinogen; it is a brown-orange-red pigmentation contributing to the color of feces and urine.

stercobilinogen
(stur″ko-bi-lin´o-jәn) a bilirubin metabolite and precursor of stercobilin, formed by reduction of urobilinogen.

stercoraceous ulcer
stercoral ulcer an ulcer caused by the pressure of impacted feces. a fistulous ulcer through which fecal matter escapes.

stercoraceous vomiting
fecal vomiting.

stercoral tumor
fecaloma.

stercoroma
(stur″kә-ro´mә) fecaloma.

sterculia gum
see karaya gum.

Stereo-orthopter
(ster″e-o-or-thop´tәr) trademark for a mirror-reflecting instrument for correcting strabismus.

stereoarthrolysis
(ster″e-o-ahr-throl´ĭ-sis) surgical creation of a movable new joint to treat ankylosis.

stereocampimeter
(ster″e-o-kam-pim´ә-tәr) an instrument for studying unilateral central scotomas and central retinal defects.

stereochemistry
(ster″e-o-kem´is-tre) the branch of chemistry dealing with the space relations of atoms in molecules. adj., stereochem´ical., adj.

stereocilia
(ster″e-o-sil´e-ә) sing. stereocil´ium long, nonmotile, filaments found on the free surface of hair cells of the inner ear and on pseudostratified epithelial cells of the male epididymis. See illustration at kinocilium.

stereocinefluorography
(ster″e-o-sin″ә-fldbobr-rog´rә-fe) recording by motion picture camera of images observed by stereoscopic fluoroscopy, affording three-dimensional visualization.

stereoencephalotomy
(ster″e-o-әn-sef″ә-lot´ә-me) stereotaxic surgery.

stereognosis
(ster″e-og-no´sis) the sense by which the form of objects is perceived. adj., stereognos´tic., adj.

stereognostic sense
the sense by which form and solidity are perceived.

stereoidentical points
points in space outside of the region within which fusion of double images occurs.

stereoisomer
(ster″e-o-i´so-mәr) a compound showing stereoisomerism.

stereoisomerism
(ster″e-o-i-som´әr-iz-әm) the relationship between two or more isomers that have the same structure (linkages between atoms) but different configurations (spatial arrangements), in contrast to constitutional isomerism, in which the isomers have different structures. Stereoisomers are further classified...

stereoradiography
(ster″e-o-ra″de-og´rә-fe) the making of a radiograph giving an impression of depth as well as of width and height.

stereoscope
(ster´e-o-skōp″) an instrument for producing the appearance of solidity and relief by combining the images of two similar pictures of an object.

stereoscopic
(ster″e-o-skop´ik) three-dimensional; having depth, as well as height and width.

stereoscopic microscope
a binocular microscope modified to give a three-dimensional view of the specimen.

stereoscopic vision
vision in depth, caused by the way the eyes are placed. Each eye has a slightly different field of vision. The two images are superimposed on each other, but because of the distance between the eyes, the image from each eye goes slightly around its side of the object. From the differences between the images and from other...

stereospecific
(ster″e-o-spә-sif´ik) exhibiting marked specificity for one of several stereoisomers of a substrate or reactant; said of enzymes or of synthetic organic reactions.

stereotactic
(ster″e-o-tak´tik) pertaining to or characterized by precise positioning in space; said especially of discrete areas of the brain that control specific functions. pertaining to types of brain surgery that use a system of three-dimensional coordinates to locate the site to be operated on. ...

stereotactic biopsy
biopsy of the brain using a stereotactic technique to locate the biopsy site. This can be done as a minimally invasive surgery technique with the patient's head held in a rigid frame so that a probe can be directed into the brain through a small hole in the skull.

stereotactic surgery
the production of sharply localized lesions in the brain after precise localization of the target tissue by use of three-dimensional coordinates. Called also stereotaxic surgery.

stereotactic system
stereotactic technique any of various techniques used to perform stereotactic surgery.

stereotaxic
(ster″e-o-tak´sik) stereotactic. thigmotactic (see thigmotaxis).

stereotaxic surgery
stereotactic surgery.

stereotaxis
(ster″e-o-tak´sis) taxis in response to contact with a solid object or rigid surface.

stereotropism
(ster″e-ot´rә-piz-әm) tropism in response to contact with a solid body or rigid surface.

stereotypic movement disorder
a mental disorder characterized by repetitive nonfunctional motor behavior, such as hand waving, rocking, head-banging, or self-biting, which often appears to be driven and can result in serious self-inflicted injuries.

stereotypy
(ster´e-o-ti″pe) the persistent repetition or sameness of acts, ideas, or words, frequently occurring in disorders such as autistic disorder and schizophrenia; called also stereotypy-habit disorder.

sterile
(ster´il) infertile (see infertility). aseptic. sterile technique aseptic technique.

sterile field
an operative field that is properly sterile according to surgical asepsis. It includes having all furniture and equipment covered with sterile drapes and all personnel being properly attired.

sterile labyrinthitis
acute serous labyrinthitis.

sterility
(stә-ril´ĭ-te) the state of being sterile.

sterility disease
a deficiency disease observed in experimental animals and due to a lack of vitamin E in the diet.

sterilization
(ster″ĭ-lĭ-za´shәn) the process of rendering an individual incapable of sexual reproduction, by castration, vasectomy, salpingectomy, or some other procedure. the process of destroying all microorganisms and their pathogenic products. Methods for doing this include heat (usually wet ...

sterilize
(ster´ĭ-līz) to subject to sterilization.

sterilizer
(ster´ĭ-līz″әr) an apparatus used in ridding objects, such as instruments or dressings, of all microorganisms and their pathogenic products. See also autoclave.

sternal
(ster´nәl) pertaining to the sternum.

sternal angle
an anatomical landmark located on the sternum; it can be felt as a notch or ridge at the top of the sternum. Called also Louis angle.

sternal biopsy
biopsy of bone marrow of the sternum removed by puncture or trephining; see also sternal puncture.

sternal puncture
insertion of a hollow needle into the manubrium of the sternum to get a sample of bone marrow. Samples are examined for abnormal cells, for the proportion of cells in various stages of development, and for the characteristics of the blood cells that predominate. This information is used along with clinical findings and other te...

sternalgia
(stәr-nal´jә) pain in the sternum.

sternalis muscle
sternal muscle: a band occasionally found parallel to the sternum on the sternocostal origin of the pectoralis major muscle.

Sternberg disease
(shtәrn´bәrg) Hodgkin disease.

Sternberg giant cells
Sternberg-Reed cells Reed-Sternberg cells.

Sternberg sign
a sign of pleurisy consisting of sensitiveness to palpation of the muscles of the shoulder girdle.

sternoclavicular
(stur″no-klә-vik´u-lәr) pertaining to the sternum and clavicle.

sternoclavicular angle
that between the sternum and the clavicle.

sternocleidomastoid
(stur″no-kli″do-mas´toid) pertaining to the sternum, clavicle, and mastoid process.

sternocleidomastoid muscle
(2 heads): origin,STERNAL HEAD—manubrium sterni, CLAVICULAR HEAD—superior surface of medial third of clavicle; insertion, mastoid process and superior nuchal line of occipital bone; innervation, accessory nerve and cervical plexus; action, flexes vertebral column, rotates head upward and to opposite side.

sternocleidomastoid vein
a vein that follows the course of the sternocleidomastoid artery and opens into the internal jugular vein.

sternocostal
(stur″no-kos´tәl) pertaining to the sternum and ribs.

sternodymia
(ster″no-dim´e-ah) union of two fetuses by the anterior chest wall.

sternodymus
(stәr-nod´ĭ-mәs) conjoined twins united at the anterior chest wall.

sternohyoid
(stur″no-hi´oid) pertaining to the sternum and hyoid bone.

sternohyoid muscle
origin, manubrium sterni, posterior sternoclavicular ligament, clavicle; insertion, body of hyoid bone; innervation, upper ansa cervicalis; action, depresses hyoid bone and larynx.

sternoid
(stur´noid) resembling the sternum.

sternomastoid
(stur″no-mas´toid) pertaining to the sternum and the mastoid process.

sternopericardial
(stur″no-per″ĭ-kahr´de-әl) pertaining to the sternum and pericardium.