| 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 |
| cystic gall duct | The ductus leading from the gallbladder; it joins the hepatic duct to form the common bile duct. Synonym: ductus cysticus. (05 Mar 2000) |
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| salivary duct | A type of intralobular duct found in some salivary glands that modifies the secretory product; it derives its name from extensive infolding of the basal membrane. Synonym: salivary duct, secretory duct. (05 Mar 2000) |
| salivary duct calculi | Small calculi found in the terminal salivary ducts may be referred to as salivary sand. Larger calculi (stones) are found in the larger ducts, such as stensen's duct and wharton's duct. (12 Dec 1998) |
| Santorini's duct | The excretory duct of the head of the pancreas, one branch of which joins the pancreatic duct, the other opening independently into the duodenum at the lesser duodenal papilla. Synonym: ductus pancreaticus accessorius, Bernard's canal, Bernard's duct, ductus dorsopancreaticus, Santorini's canal, Santorini's duct. (05 Mar 2000) |
| hemithoracic duct | An accessory thoracic duct, usually emptying into the thoracic duct but sometimes discharging independently into the right subclavian vein. Synonym: ductus hemithoracicus. (05 Mar 2000) |
| Hensen's duct | A short membranous tube passing from the lower end of the saccule to the cochlear duct of the membranous labyrinth. Synonym: ductus reuniens, canaliculus reuniens, canalis reuniens, Hensen's canal, Hensen's duct, uniting canal. (05 Mar 2000) |
| pronephric duct | The duct of the pronephros; serves as the mesonephric duct. Synonym: nephric duct. (05 Mar 2000) |
| hepatic duct | See: common hepatic duct, right hepatic duct, left hepatic duct. (05 Mar 2000) |
| hepatic duct, common | Predominantly extrahepatic bile duct which is formed by the junction of the right and left hepatic ducts, which are predominantly intrahepatic, and, in turn, joins the cystic duct to form the common bile duct. (12 Dec 1998) |
| hepatocystic duct | The part of the biliary duct system that is formed by the confluence of right and left hepatic ducts. at the porta hepatis it is joined by the cystic duct to become the common bile duct. Synonym: ductus hepaticus communis, hepatocystic duct. (05 Mar 2000) |
| Hoffmann's duct | The excretory duct of the pancreas that extends through the gland from tail to head where it empties into the duodenum at the greater duodenal papilla. Synonym: ductus pancreaticus, Hoffmann's duct, Wirsung's canal, Wirsung's duct. (05 Mar 2000) |
| secretory duct | A type of intralobular duct found in some salivary glands that modifies the secretory product; it derives its name from extensive infolding of the basal membrane. Synonym: salivary duct, secretory duct. (05 Mar 2000) |
| seminal duct | Any one of the duct's conveying semen from the epididymis to the urethra, ductus deferens, or ejaculatory duct. Synonym: gonaduct. (05 Mar 2000) |
| simple crus of saemicircular duct | The non-ampullary end of the lateral saemicircular duct that opens independently into the utricle. Synonym: crus membranaceum simplex ductus saemicircularis, simple membranous limb of saemicircular duct. (05 Mar 2000) |
| simple membranous limb of saemicircular duct | The non-ampullary end of the lateral saemicircular duct that opens independently into the utricle. Synonym: crus membranaceum simplex ductus saemicircularis, simple membranous limb of saemicircular duct. (05 Mar 2000) |