| Lewandowski | Felix, German dermatologist, 1879-1921. See: Jadassohn-Lewandowski syndrome, nevus elasticus of Lewandowski. (05 Mar 2000) |
|---|---|
| Lewis | Gilbert N., U.S. Chemist, 1875-1946. See: Lewis acid, Lewis base, second law of thermodynamics. (05 Mar 2000) |
| Lewis acid | An acid that is an electron pair acceptor. (05 Mar 2000) |
| Lewis base | A base that is an electron-pair donor. (05 Mar 2000) |
| Lewis blood group | <haematology> A pair of blood group activities associated with the A, B, H substances. Lewis Lea is a separate gene, whereas Leb arises from the combined activity of the enzymes specified by Le(a) and H genes. (18 Nov 1997) |
| lewis blood-group system | A group of dominantly and independently inherited antigens associated with the abo blood factors. They are glycolipids present in plasma and secretions that may adhere to the erythrocytes. The phenotype le(b) is the result of the interaction of the le gene le(a) with the genes for the abo blood groups. (12 Dec 1998) |
| lewisite | C2H2AsCl3; dichloro(2-chlorovinyl)arsine;a war gas. It is a vesicant, a lung irritant like mustard gas, a systemic poison entering the circulation through the lungs or skin, and a mitotic poison arresting mitosis in the metaphase; dimercaprol is the antidote. Synonym: beta-chlorovinyldichloroarsine. Origin: W. Lee Lewis, U.S. Chemist 1898-1943 (05 Mar 2000) |
| lewy bodies | Intracytoplasmic, eosinophilic, round to elongated inclusions found in vacuoles of injured or fragmented neurons. The presence of lewy bodies is the histological marker of the degenerative changes in parkinson disease but they may be seen in other neurological conditions. They are typically found in the substantia nigra and locus coeruleus but they are also seen in the basal forebrain, hypothalamic nuclei, and neocortex. (12 Dec 1998) |
| Lewy, Frederic | <person> German neurologist in the U.S., 1885-1950. See: Lewy bodies. (05 Mar 2000) |