| leucophyll | <chemistry> A colourless substance isomeric with chlorophyll, contained in parts of plants capable of becoming green. Origin: Leuco- + Gr. A leaf. Source: Websters Dictionary (01 Mar 1998) |
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| leucophyllous | <botany> Having white or silvery foliage. Origin: Gr.; white + a leaf. Source: Websters Dictionary (01 Mar 1998) |
| leucoplakia | A white patch or plaque on a mucous membrane that will not rub off, often in the oral cavity. Considered premalignant. Origin: Gr. Plax = plate (18 Nov 1997) |
| leucoplast | Colourless plastid, that may be an etioplast or a storage plastid (amyloplast, elaioplast or proteinoplast). (18 Nov 1997) |
| leucoplastid | <botany> One of certain very minute whitish or colourless granules occurring in the protoplasm of plants and supposed to be the nuclei around which starch granules will form. Origin: Leuco- + Gr. To mold. Source: Websters Dictionary (01 Mar 1998) |
| leucopyrite | <chemical> A mineral of a colour between white and steel-gray, with a metallic luster, and consisting chiefly of arsenic and iron. Origin: Leuco- + pyrites. Source: Websters Dictionary (01 Mar 1998) |
| leucorrhoea | <medicine> A discharge of a white, yellowish, or greenish, viscid mucus, resulting from inflammation or irritation of the membrane lining the genital organs of the female; the whites. Origin: Leuco- + Gr. "rei^n to flow. Source: Websters Dictionary (01 Mar 1998) |
| leucoryx | <zoology> A large antelope of North Africa (Oryx leucoryx), allied to the gemsbok. Origin: NL, from Gr. + a kind of gazelle. Source: Websters Dictionary (01 Mar 1998) |
| leucoscope | <instrument, physics> An instrument, devised by Professor Helmholtz, for testing the colour perception of the eye, or for comparing different lights, as to their constituent colour or their relative whiteness. Origin: Leuco- + -scope. Source: Websters Dictionary (01 Mar 1998) |
| leucosis | The correct term for an excess of leucocytes in the circulation and other parts of the body, preferable in place of the term leucocytosis. (18 Nov 1997) |
| leucosoid | <zoology> Like or pertaining to the Leucosoidea, a tribe of marine crabs including the box crab or Calappa. Origin: NL. Leucosia, the typical genus (fr. Gr. White). Source: Websters Dictionary (01 Mar 1998) |
| leucosphere | <astronomy> The inner corona. Origin: Leuco- + sphere. Source: Websters Dictionary (01 Mar 1998) |
| leucotriene | <biochemistry> A family of hydroxyeicosotrienenoic (HETE) acid derivatives in which the lipid moiety is conjugated to glutathione or cysteine. Members of the group are potent pharmacological mediators, for example SRS A, the slow reacting substance of anaphylaxis. (18 Nov 1997) |
| leucoturic | <chemistry> Pertaining to, or designating, a nitrogenous organic substance of the uric acid group, called leucoturic acid or oxalantin. See Oxalantin. Origin: Leuco- + allantoic + uric. Source: Websters Dictionary (01 Mar 1998) |
| leucous | White; applied to albinos, from the whiteness of their skin and hair. Origin: Gr. Source: Websters Dictionary (01 Mar 1998) |