online medical dictionary | definition of Lewis

An acid that is an electron pair acceptor.

(05 Mar 2000)

A base that is an electron-pair donor.

(05 Mar 2000)

<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.

This entry appears with permission from the Dictionary of Cell and Molecular Biology

(11 Mar 2008)

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)

<person>

Preferred term: Fox, Lewis

<person>

A U.S. Chemist, 1875-1946.

See: Lewis acid, Lewis base, second law of thermodynamics.

(05 Mar 2000)

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.

Synonyms: beta-chlorovinyldichloroarsine.

Origin: W. Lee Lewis, U.S. Chemist 1898-1943

(05 Mar 2000)

<person>

Preferred term: Sayre, Lewis