| IMA | Industrial Medical Association; inferior mesenteric artery; Interchurch Medical Assistance; internal... |
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| IMG | inferior mesenteric ganglion; internal medicine group [practice]; international medical graduate |
| IMI | immunologically measurable insulin; impending myocardial infarction; Imperial Mycological Institute ... |
| IMV | inferior mesenteric vein; intermittent mandatory ventilation; intermittent mechanical ventilation; i... |
| INA | infectious nucleic acid; inferior nasal artery; International Neurological Association |
| duodenojejunal recess | A peritoneal recess extending upward behind the superior duodenal fold. Synonym: recessus duodenalis superior, duodenojejunal fossa, duodenojejunal recess, Jonnesco's fossa, superior duodenal fossa. (05 Mar 2000) |
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| infundibular recess | A funnel-shaped diverticulum leading from the anterior portion of the third ventricle down into the infundibulum of the hypophysis. Synonym: recessus infundibuli, aditus ad infundibulum. (05 Mar 2000) |
| intersigmoid recess | A triangular peritoneal recess behind and below the sigmoid colon created by the attachment of the sigmoid mesocolon ascending across the left psoas then turning sharply to descend into the pelvis; the left ureter (pars tecta ureterica) passes posterior to this recess. Synonym: recessus intersigmoideus. (05 Mar 2000) |
| optic recess | A diverticulum extending forward from the anterior part of the third ventricle above the optic chiasm. Synonym: recessus opticus. (05 Mar 2000) |
| elliptical recess | An oval depression in the roof and inner wall of the vestibule of the labyrinth, lodging the utriculus. Synonym: recessus ellipticus, fovea elliptica, fovea hemielliptica. (05 Mar 2000) |
| triangular recess | An occasional evagination of the anterior wall of the third ventricle of the brain between the anterior commissure and the diverging pillars of the fornix. Synonym: recessus triangularis. (05 Mar 2000) |
| epitympanic recess | The upper portion of the tympanic cavity above the tympanic membrane; it contains the head of the malleus and the body of the incus. Synonym: recessus epitympanicus, attic, epitympanic space, epitympanum, Hyrtl's epitympanic recess, tympanic attic. (05 Mar 2000) |
| tubotympanic recess | The dorsal portion of the embryonic first endodermal pharyngeal pouch; it develops into the middle ear cavity. (05 Mar 2000) |
| Jacquemet's recess | A pouch of peritoneum between the gallbladder and the liver. (05 Mar 2000) |
| lateral recess of fourth ventricle | The narrow recess of the ventricle that extends laterally over, and down along the side of, the inferior cerebellar peduncle and the overlying cochlear nuclei; at its tip it opens by way of Luschka's foramen into the interopeduncular cistern of the subarachnoid space. By way of this recess, part of the choroid plexus of the fourth ventricle protrudes into the subarachnoid space. Synonym: recessus lateralis ventriculi quarti. (05 Mar 2000) |
| aditus glottidis inferior | The part of the cavity of the larynx immediately below the glottis. Synonym: cavitas infraglotticum, aditus glottidis inferior, cavum infraglotticum, inferior laryngeal cavity, infraglottic space. (05 Mar 2000) |
| angulus inferior scapulae | The acute angle formed by junction of the medial and lateral borders of the scapula. Synonym: angulus inferior scapulae. (05 Mar 2000) |
| anterior inferior cerebellar artery | <anatomy, artery> Origin, basilar; distribution, lower surface of lateral lobes of cerebellum, choroid plexus in cerebellopontine angle; anastomoses, posterior inferior cerebellar; usual source of labyrinthine artery. Synonym: arteria cerebelli inferior anterior. (05 Mar 2000) |
| anterior inferior iliac spine | Spine on the anterior border of the ilium between the anterior superior iliac spine and the acetabulum; site of origin for the direct head of the rectus femoris muscle. Synonym: spina iliaca anterior inferior. (05 Mar 2000) |
| anterior inferior segment | Anterior inferior segment of kidney. Synonym: segmentum anterius inferius. (05 Mar 2000) |