| medial tubercle of posterior process of talus | The eminence medial to the sulcus for the flexor hallucis longus tendon. Synonym: tuberculum mediale processus posterioris tali. (05 Mar 2000) |
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| medial umbilical fold | A fold of peritoneum on the lower part of the anterior abdominal wall that covers the obliterated umbilical artery on either side of the urachus. Synonym: plica umbilicalis medialis, plica hypogastrica. (05 Mar 2000) |
| medial umbilical ligament | <anatomy> The obliterated umbilical artery that persists as a fibrous cord passing upward alongside the bladder to the umbilicus. Synonym: ligamentum umbilicale mediale. (05 Mar 2000) |
| medial vastus muscle | <anatomy, muscle> Origin, medial lip of linea aspera; insertion, tibial tuberosity by way of common tendon of quadriceps femoris and ligamentum patellae; action, extends leg; nerve supply, femoral. Synonym: musculus vastus medialis, medial great muscle, medial vastus muscle, musculus vastus internus. (05 Mar 2000) |
| medial vein of lateral ventricle | A vein that drains deep portions of the parietal and occipital lobes; it runs in the medial wall of the lateral ventricle to empty into the internal cerebral vein or the great cerebral vein. Synonym: vena ventriculi lateralis medialis, medial atrial vein, medial vein of lateral ventricle. (05 Mar 2000) |
| medial venule of retina | The small vein that passes from the part of the retina between the macula and the optic disk to join the central vein. Synonym: venula medialis retinae. (05 Mar 2000) |
| medial vestibular nucleus | Nucleus vestibularis medialis. See: vestibular nucleus. (05 Mar 2000) |
| medial wall of middle ear | A bony layer separating the middle from the internal ear or labyrinth; it contains the fenestra vestibuli and the fenestra cochleae. Synonym: paries labyrinthicus cavi tympani, labyrinthine wall of middle ear, medial wall of middle ear. (05 Mar 2000) |
| medial wall of orbit | The thin, rectangular wall of the orbit formed by the orbital plate of the ethmoid, lacrimal, frontal and a small part of the sphenoid bones; the fossa for the lacrimal sac lies at its anterior limit. Synonym: paries medialis orbitae. (05 Mar 2000) |
| medial wall of tympanic cavity | A bony layer separating the middle from the internal ear or labyrinth; it contains the fenestra vestibuli and the fenestra cochleae. Synonym: paries labyrinthicus cavi tympani, labyrinthine wall of middle ear, medial wall of middle ear. (05 Mar 2000) |
| medialecithal | Denoting an egg with a moderate amount of yolk, as in amphibians. Origin: L. Medialis, medial, + G. Lekithos, egg yolk (05 Mar 2000) |
| medialis | Synonym: medial, medial. Origin: L. (05 Mar 2000) |
| medially deviated ureter | <radiology> Retroperitoneal fibrosis, pelvic lipomatosis, abdomino-perineal resection, retrocaval ureter, normal variant (12 Dec 1998) |
| medialuna | <zoology> See Half-moon. Origin: Sp. Media luna half-moon. Source: Websters Dictionary (01 Mar 1998) |
| median | <statistics> Any value that divides the probability of a random variable in half, i.e. The probability of observing a value above the median and the probability of observing a value below the median are both less than or equal to one half. For a finite population or sample, the median is the middle value of an odd number of values (arranged in ascending order) or any value between the two middle values of an even number of values, in the latter case it is conventional to use the average of the two middle values. Origin: L. Medianus (18 Nov 1997) |