| MPD | main pancreatic duct; maximum permissible dose; mean population doubling; membrane potential differe... |
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| NLD | nasolacrimal duct; necrobiosis lipoidica diabeticorum |
| PCD | pacer-cardioverter-defibrillator; papillary collecting duct; paraneoplastic cerebellar degeneration;... |
| PD | Doctor of Pharmacy; Dublin Pharmacopoeia; interpupillary distance; Paget disease; pancreatic duct; p... |
| PDL | pancreatic duct ligation; periodontal ligament; poorly differentiated lymphocyte; population doublin... |
| oblique vein of left atrium | A small vein on the posterior wall of the left atrium which merges with the great cardiac vein to form the coronary sinus; it is developed from the left common cardinal vein, and occasionally persists as a left superior vena cava. Synonym: vena obliqua atrii sinistri, Marshall's oblique vein. (05 Mar 2000) |
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| oesophageal branches of the left gastric artery | <anatomy, artery> Ascends through oesophageal hiatus of diaphragm to supply lowermost (cardiac) oesophagus; anastomosis: oesophageal branches of thoracic aorta. Synonym: rami oesophageales arteriae gastricae sinistrae. (05 Mar 2000) |
| transverse part of left branch of portal vein | <anatomy, vein> The long unbranched portion of the left branch of the portal vein. Synonym: pars transversa rami sinistri venae portae hepatis. (05 Mar 2000) |
| umbilical part of left branch of portal vein | <anatomy, vein> The highly branched part of the left branch of the portal vein; the round and venous ligaments attach to this part. Synonym: pars umbilicalis rami sinistri venae portae hepatis. (05 Mar 2000) |
| fold of left vena cava | A pericardial fold lying between the left oblique vein of the atrium and the left superior pulmonary vein containing the obliterated remains of the left superior vena cava. Synonym: plica venae cavae sinistrae, Marshall's vestigial fold, vestigial fold. (05 Mar 2000) |
| left | Of or pertaining to that side of the body in man on which the muscular action of the limbs is usually weaker than on the other side; opposed to right, when used in reference to a part of the body; as, the left ear. Also said of the corresponding side of the lower animals. Left bank of a river, that which is on the left hand of a person whose face is turned downstream. Left bower. See Bower. Left center, the members whose sympathies are, in the main, with the members of the Left, but who do not favor extreme courses, and on occasions vote with the government. They sit between the Center and the extreme Left. Over the left shoulder, or Over the left, an old but still current colloquialism, or slang expression, used as an aside to indicate insincerity, negation, or disbelief; as, he said it, and it is true, over the left. Origin: OE. Left, lift, luft; akin to Fries. Leeft, OD.lucht, luft; cf. AS.left (equiv. To L. Inanis), lyftadl palsy; or cf. AS.lf weak. Source: Websters Dictionary (01 Mar 1998) |
| left atrial pressure | <radiology> 15-20 mm Hg redistribution 20-25 interstitial oedema 25-30 airspace oedema (12 Dec 1998) |
| left atrioventricular valve | <anatomy, cardiology> The heart valve that divides the left atrium and left ventricle. During left atrial contraction, the mitral valve opens to allow blood to flow into the left ventricle. Upon closure, the mitral valve prohibits the regurgitation of blood back into the left atrium. The mitral valve is the only heart valve that has only 2 valve cusps (all others have 3). (13 Nov 1997) |
| left atrium | <anatomy> The thin-walled chamber of the heart which pumps blood into the left ventricle for ejection into the systemic circulation. (27 Sep 1997) |
| left auricular appendage | The small conical projection from the left atrium of the heart. Synonym: auricula sinistra, left auricular appendage. (05 Mar 2000) |
| left axis deviation | A mean electrical axis of the heart pointing to -30 |
| left branch | Of a pair of branches, the branch passing to the left side of the body, to the left member of a bilateral pair of structures, or to the left portion of an unpaired structure; the other member of the pair being a right branch. Synonym: ramus sinister. (05 Mar 2000) |
| left colic artery | <anatomy, artery> Origin, inferior mesenteric; distribution, descending colon and splenic flexure; anastomoses, middle colic, sigmoid. Synonym: arteria colica sinistra. (05 Mar 2000) |
| left colic flexure | The bend at the junction of the transverse and descending colon. Synonym: flexura coli sinistra, splenic flexure. (05 Mar 2000) |
| left colic lymph nodes | Small nodes along the left colic artery and its branches that drain the left flexure and upper part of the descending colon; efferent vessels pass to the inferior mesenteric nodes. Synonym: nodi lymphatici colici sinistri. (05 Mar 2000) |