| LAS | laboratory automation system; lateral amyotrophic sclerosis; laxative abuse syndrome; left anterior-... |
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| LASH | left anterior superior hemiblock |
| LSR | lanthanide shift reagent; lecithin/ sphingomyelin ratio; left superior rectus [muscle]; liver/spleen... |
| LSVC | left superior vena cava |
| MSO | management service organization; medial superior olive; medical staff organization |
| basal vein of Rosenthal | A large vein passing caudally and dorsally along the medial surface of the temporal lobe from which it receives tributaries; it empties into the great cerebral vein (of Galen) from the lateral side. Synonym: vena basalis, Rosenthal's vein. (05 Mar 2000) |
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| basilic vein | <anatomy, vein> Arises from the ulnar side of the dorsal venous network of the hand; it curves around the medial side of the forearm, communicates with the cephalic vein via the median cubital vein, and passes up the medial side of the arm to join the axillary vein. Synonym: vena basilica. (05 Mar 2000) |
| basivertebral vein | <anatomy, vein> One of a number of veins in the spongy substance of the bodies of the vertebrae, emptying into the anterior internal vertebral venous plexus. Synonym: vena basivertebralis. (05 Mar 2000) |
| Breschet's vein | <anatomy, vein> One of the veins in the diploe of the cranial bones, connected with the cerebral sinuses by emissary veins; the main diploic veins are the frontal, anterior temporal, posterior temporal, and occipital. Synonym: vena diploica, Breschet's vein, Dupuytren's canal. (05 Mar 2000) |
| Browning's vein | <anatomy, vein> An inconstant vein that passes from the superficial middle cerebral vein posteriorly over the lateral aspect of the temporal lobe to enter the transverse sinus. Synonym: vena anastomotica inferior, Browning's vein, Labbe's vein. (05 Mar 2000) |
| bulb of jugular vein | <anatomy, vein> One of two dilated parts of the internal jugular vein: the superior bulb (Heister's diverticulum) is a dilation at the beginning of the internal jugular vein in the jugular fossa of the temporal bone; the inferior bulb is a dilat ed portion of the vein just before it reaches the brachiocephalic vein. Synonym: jugular bulb, bulbus venae jugularis. (05 Mar 2000) |
| Burow's vein | <anatomy, vein> An occasional vein passing from the inferior epigastric, sometimes receiving a tributary from the urinary bladder, which empties into the portal vein, one of the renal veins. (05 Mar 2000) |
| capillary vein | <zoology> A small vein; a veinlet; specifically, one of the small branches of the veins of the wings in insects. Origin: L. Venula, dim. From vena vein. Source: Websters Dictionary (01 Mar 1998) |
| palatine vein | <anatomy, vein> Drains the palatine regions and empties into the facial vein. Synonym: vena palatina. (05 Mar 2000) |
| varicose vein | <anatomy, surgery> An abnormal swelling and tortuosity especially of the superficial veins of the legs. (18 Nov 1997) |
| Gartner's vein phenomenon | Fullness of the veins of the arm and hand held below heart level and collapse at a certain variable distance above that level. (05 Mar 2000) |
| vein | 1. Blood vessel that returns blood from the microvasculature to the heart, walls thinner and less elastic than those of artery. 2. In leaves, thickened portion of leaf containing vascular bundle, the pattern, venation, is characteristic for each species. (18 Nov 1997) |
| vein of bulb of penis | A tributary of the internal pudendal vein that drains the bulb of the penis. Synonym: vena bulbi penis. (05 Mar 2000) |
| vein of cochlear aqueduct | It drains the cochlea, sacculus, and part of the utricules, and empties into the superior bulb of the jugular vein by accompanying the perilymphatic duct through the cochlear canaliculus. Synonym: vena aqueductus cochleae, vein of cochlear aqueduct, vena canaliculi cochleae. (05 Mar 2000) |
| vein of cochlear canaliculus | It drains the cochlea, sacculus, and part of the utricules, and empties into the superior bulb of the jugular vein by accompanying the perilymphatic duct through the cochlear canaliculus. Synonym: vena aqueductus cochleae, vein of cochlear aqueduct, vena canaliculi cochleae. (05 Mar 2000) |