| MCD | magnetic circular dichroism; mast-cell degranulation; mean cell diameter; mean of consecutive differ... |
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| MD | Doctor of Medicine [Lat. Medicinae Doctor]; magnesium deficiency; main duct; maintenance dose; major... |
| MDS | Master of Dental Surgery; maternal deprivation syndrome; medical data screening; medical data system... |
| MPD | main pancreatic duct; maximum permissible dose; mean population doubling; membrane potential differe... |
| NLD | nasolacrimal duct; necrobiosis lipoidica diabeticorum |
| right crus of diaphragm | The muscular origin of the diaphragm from the bodies of the upper three or four lumbar vertebrae that passes upward to the right of the aorta toward the central tendon; the oesophageal hiatus is a parting of the fibres of the right crus to allow passage of the oesophagus. Synonym: crus dextrum diaphragmatis. (05 Mar 2000) |
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| groove of crus of the helix | A transverse fissure on the cranial surface of the auricle corresponding to the crus of the helix. Synonym: sulcus cruris helicis. (05 Mar 2000) |
| posterior crus of stapes | The posterior of the two delicate limbs of the stapes that connect the head and base or footplate of the bone. Synonym: crus posterius stapedis, posterior limb of stapes. (05 Mar 2000) |
| crus | Synonym: leg. 2. Any anatomical structure resembling a leg; usually (in the plural) a pair of diverging bands or elongated masses. See: limb. Origin: L. (05 Mar 2000) |
| crus anterius capsulae internae | The portion of the internal capsule between the head of the caudate nucleus and the putamen; it lies anterior to the genu of the internal capsule. Synonym: crus anterius capsulae internae. (05 Mar 2000) |
| crus anterius stapedis | The anterior of the two delicate curving limbs of the stapes that pass from the head of the bone to the base or footplate. Synonym: crus anterius stapedis, anterior limb of stapes. (05 Mar 2000) |
| crus anthelicis | One of two ridges, inferior and superior, bounding the fossa triangularis, by which the antihelix begins at the upper part of the auricle. Synonym: crus anthelicis, leg of antihelix. (05 Mar 2000) |
| crus breve incudis | The short crus of incus; the process of the incus that fits into a depression (fossa incudis) in the epitympanic recess. Synonym: crus breve incudis. (05 Mar 2000) |
| crus cerebri | Specifically, the massive bundle of corticofugal nerve fibres passing longitudinally on the ventral surface of the midbrain on each side of the midline; it consists of fibres descending from the cortex to the tegmentum of the brainstem, pontine gray matter, and spinal cord. See: cerebral peduncle, basis pedunculi. (05 Mar 2000) |
| crus clitoridis | The continuation on each side of the corpus cavernosum of the clitoris which diverges from the body posteriorly and is attached to the pubic arch. Synonym: crus clitoridis. (05 Mar 2000) |
| crus corporis cavernosi penis | The posterior, tapering portion of the corpus cavernosum penis which diverges from its contralateral partner to be attached to the ischiopubic ramus. Synonym: crus penis, crus corporis cavernosi penis. (05 Mar 2000) |
| crus dextrum diaphragmatis | The muscular origin of the diaphragm from the bodies of the upper three or four lumbar vertebrae that passes upward to the right of the aorta toward the central tendon; the oesophageal hiatus is a parting of the fibres of the right crus to allow passage of the oesophagus. Synonym: crus dextrum diaphragmatis. (05 Mar 2000) |
| crus dextrum fasciculi atrioventricularis | The right leg or branch of the atrioventricular bundle which diverges from the left crus just below the membranous portion of the interventricular septum to descend the septal wall of the right ventricle and ramify beneath the endocardium. Synonym: crus dextrum fasciculi atrioventricularis. (05 Mar 2000) |
| crus fornicis | That part of the fornix that rises in a forward curve behind the thalamus to continue forward as the body for fornix ventral to the corpus callosum. Synonym: crus of fornix, posterior pillar of fornix. (05 Mar 2000) |
| crus helicis | A transverse ridge continuing backward from the helix of the auricle, dividing the concha into an upper portion (cymba) and a lower portion (cavity of concha). Synonym: crus helicis, crista helicis, limb of helix. (05 Mar 2000) |