| small canal of chorda tympani | A canal leading from the facial canal to the tympanic cavity through which the chorda tympani nerve enters this cavity. Synonym: canaliculus chordae tympani, iter chordae posterius, small canal of chorda tympani. (05 Mar 2000) |
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| small cardiac vein | <anatomy, vein> An inconstant vessel, accompanying the right coronary artery in the coronary sulcus, from the right margin of the right ventricle, and emptying into the coronary sinus or the middle cardiac vein. Synonym: vena cordis parva. (05 Mar 2000) |
| small deep petrosal nerve | <anatomy, nerve> One of two sympathetic branches from the internal carotid plexus to the tympanic plexus. Synonym: nervus caroticotympanicus, small deep petrosal nerve. (05 Mar 2000) |
| small for gestational age | <obstetrics, paediatrics> A weight classification of newborns associated with poor health outcomes, the weight falling below the 10th percentile on the intrauterine growth curve for the infant's calculated gestational age. (27 Sep 1997) |
| small gallbladder | <radiology> Chronic cholecystitis, cystic fibrosis (seen in 30-50% of CF patients), congenital anomaly (multiseptate, hypoplastic) Cf: large gall bladder (12 Dec 1998) |
| small increment sensitivity index | The sounding of a tone 20 dB above threshold, followed by a series of 200-msec tones 1 dB louder; perception of these is indicative of cochlear damage. Synonym: small increment sensitivity index test. (05 Mar 2000) |
| small increment sensitivity index test | The sounding of a tone 20 dB above threshold, followed by a series of 200-msec tones 1 dB louder; perception of these is indicative of cochlear damage. Synonym: small increment sensitivity index test. (05 Mar 2000) |
| small interarch distance | A small distance between the maxillary and mandibular arches. Synonym: close bite. (05 Mar 2000) |
| small intestine | <anatomy, gastroenterology> The small intestine is composed of three sections: duodenum, jejunum and ileum. All are involved in the absorption of nutrients. The total length of the small intestine is approximately 22 feet. (27 Sep 1997) |
| small lymphocytic lymphoma | <tumour> Essentially the same disease as chronic lymphocytic leukaemia, except that lymphocytes are not increased in the peripheral blood; lymph nodes are enlarged and other lymphoid tissue or bone marrow is infiltrated by small lymphocytes. Synonym: small lymphocytic lymphoma. (05 Mar 2000) |
| small nuclear RNA | <molecular biology> A nucleic acid found in all living cells. Plays a role in transferring information from DNA to the protein-forming system of the cell. (16 Dec 1997) |
| small pancreas | A portion of the head of the pancreas that hooks around posterior to the superior mesenteric vessels, sometimes into the "nutcracker" formed by the superior mesenteric artery and abdominal aorta. Synonym: processus uncinatus pancreatis, lesser pancreas, pancreas minus, small pancreas, uncinate pancreas, unciform pancreas, Willis' pancreas, Winslow's pancreas. (05 Mar 2000) |
| small pelvis | The cavity of the pelvis below the brim or superior aperture. Synonym: pelvis minor, pelvis vera, small pelvis, true pelvis. (05 Mar 2000) |
| small plaque parapsoriasis | See: parapsoriasis en plaque. Synonym: small plaque parapsoriasis. (05 Mar 2000) |
| small pudendal lip | One of two narrow longitudinal folds of mucous membrane enclosed in the pudendal cleft within the labia majora; posteriorly, they gradually merge into the labia majora and join to form the frenulum labiorum pudendi (fourchette); anteriorly, each labium divides into two portions which unite with those of the opposite side in front of the glans clitoridis to form the prepuce. Synonym: labium minus pudendi, small pudendal lip. (05 Mar 2000) |