| Leuc- | pos>pref. Same as Leuco-. [ 1913 Webster ] | | Leuc- | { } pref. [ Gr. leyko`s white. ] A combining form signifying white, colorless; specif. (Chem.), denoting an extensive series of colorless organic compounds, obtained by reduction from certain other colored compounds; as, leucaniline, leucaurin, etc. [ 1913 Webster ] Variants: Leuco- | | Leucadendron | ‖n. [ NL., fr. Gr. leyko`s white + de`ndron tree. ] (Bot.) A genus of evergreen shrubs from the Cape of Good Hope, having handsome foliage. Leucadendron argenteum is the silverboom of the colonists. [ 1913 Webster ] | | Leucaniline | n. [ Leuc- + aniline. ] (Chem.) A colorless, crystalline, organic base, obtained from rosaniline by reduction, and also from other sources. It forms colorless salts. [ 1913 Webster ] | | Leuchaemia | ‖n. [ NL., fr. Gr. leyko`s white + a"i^ma blood.] (Med.) See Leukemia. [Written also leukemia, leukaemia,a nd leucemia.]
-- Leu*chæm"ic a. [ Written also leukemic and leukaemic. ] [ 1913 Webster ] | | Leucin | n. [ Gr. leyko`s white. ] (Physiol. Chem.) a naturally occurring alpha-amino acid ((CH3)2CH.CH2.CH(NH2)-COOH), one of the building units of almost all proteins of living organisms, both animal and vegetable. It is one of the essential amino acids (not synthesized by the human body, a required component for proper nutrition), and is hydrophobic in character when bound in proteins. In isolated form it is a white, crystalline, zwitterionic substance formed, e. g. by the decomposition of proteins by pancreatic digestion, by the action of boiling dilute mineral acid, or by putrefaction. Chemically it is to be considered as amido-caproic acid. It occurs as two optical isomers, the L- and D-forms. The L-form, L-leucine, is the natural form, present in most proteins. [ 1913 Webster +PJC ] Variants: Leucine | | Leucinic | { } a. (Chem.) Pertaining to, or designating, an acid obtained from leucin, and called also oxycaproic acid. [ 1913 Webster ] Variants: Leucic | | Leuciscus | prop. n. A genus of freshwater fishes including the dace (Leuciscus leuciscus).
Syn. -- genus Leuciscus. [ WordNet 1.5 ] | | Leucite | n. [ Gr. leyko`s white: cf. F. leucite. ] [ 1913 Webster ] 1. (Min.) A mineral having a glassy fracture, occurring in translucent trapezohedral crystals. It is a silicate of alumina and potash KAlSi2O6. It is found in the volcanic rocks of Italy, especially at Vesuvius. [ 1913 Webster ] 2. (Bot.) A leucoplast. [ 1913 Webster ] | | Leucitic | a. (Min.) Containing leucite; as, leucitic rocks. [ 1913 Webster ] |
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