| 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 |
| mammary duct ectasia | A noncancerous breast disease most often found in women during menopause. The ducts in or beneath the nipple become clogged with cellular and fatty debris. The duct may have gray to greenish discharge, a lump you can feel and can become inflamed, causing pain. (09 Oct 1997) |
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| paramesonephric duct | Either of the two paired embryonic tubes extending along the mesonephros roughly parallel to the mesonephric duct and emptying into the cloaca; in the female, the upper parts of the ducts form the uterine tubes, while the lower fuse to form the uterus and part of the vagina; in the male, vestiges of the ducts form the vagina masculina and the appendix testis. Synonym: ductus paramesonephricus, Muller's duct, mullerian duct. (05 Mar 2000) |
| genital duct | The genital passages of the urogenital apparatus. Synonym: genital duct. (05 Mar 2000) |
| carotid duct | A portion of the embryonic dorsal aorta between points of juncture with the third and fourth arch arteries; it disappears early in development. Synonym: carotid duct. (05 Mar 2000) |
| parotid duct | The duct of the parotid gland opening from the cheek into the vestibule of the mouth opposite the neck of the superior second molar tooth. Synonym: ductus parotideus, Blasius' duct, Stensen's duct, Steno's duct. (05 Mar 2000) |
| vitelline duct | The narrow tube connecting the yolk sac with the midgut of the embryo; persistence of all or part of it in post-foetal life produces abnormalities, of which the commonest is meckel's diverticulum. (12 Dec 1998) |
| Pecquet's duct | <anatomy> The major efferent lymph duct into which lymph from most of the peripheral lymph nodes drains. Recirculating lymphocytes that have left the circulation in the lymph node return to the blood through the thoracic duct. (18 Nov 1997) |
| cervical duct | See: cervical diverticulum. (05 Mar 2000) |
| cervical part of thoracic duct | The portion of the thoracic duct above the first rib. Synonym: pars cervicalis ductus thoracici. (05 Mar 2000) |
| perilymphatic duct | A fine canal connecting the perilymphatic space of the cochlea with the subarachnoid space. Synonym: ductus perilymphaticus, aqueductus cochleae, cochlear aqueduct. (05 Mar 2000) |
| mesonephric duct | A duct in the embryo draining the mesonephric tubules; in the male it becomes the ductus deferens; in the female it becomes vestigial. See: longitudinal duct of epoophoron. Synonym: ductus mesonephricus, wolffian duct. (05 Mar 2000) |
| right duct of caudate lobe | The bile duct from the right half of the caudate lobe, a tributary to the right hepatic duct. Synonym: ductus lobi caudati dexter. (05 Mar 2000) |
| right hepatic duct | The duct that transmits bile to the common hepatic duct from the right half of the liver and the right part of the caudate lobe. Synonym: ductus hepaticus dexter. (05 Mar 2000) |
| right lymphatic duct | One of the two terminal lymph vessels, a short trunk, about 2 cm in length, formed by the union of the right jugular lymphatic vessel and vessels from the lymph nodes of the right superior limb, thoracic wall, and both lungs; it lies on the right side of the root of the neck and empties into the right brachiocephalic vein. Synonym: ductus lymphaticus dexter, ductus thoracicus dexter. (05 Mar 2000) |
| metanephric duct | The slender tubular portion of the metanephric diverticulum; the primordium of the epithelial lining of the ureter. See: epoophoron, longitudinal duct of epoophoron. (05 Mar 2000) |