| leucomethylene blue | The reduced and colourless form of methylene blue. Synonym: methylene white. (05 Mar 2000) |
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| leucomycins | <chemical> An antibiotic complex produced by streptomyces kitasatoensis. The complex consists of a mixture of at least eight biologically active components, a1 and a3 to a9. Leucomycins have both antibacterial and antimycoplasmal activities. Pharmacological action: antibiotics, macrolide. (12 Dec 1998) |
| leuconic | <chemistry> Pertaining to, or designating, a complex organic acid, obtained as a yellowish white gum by the oxidation of croconic acid. Origin: Leuc- + croconic. Source: Websters Dictionary (01 Mar 1998) |
| leuconostoc | A genus of gram-positive, facultatively anaerobic bacteria whose growth is dependent on the presence of a fermentable carbohydrate. It is nonpathogenic to plants and animals, including humans. (12 Dec 1998) |
| Leuconostoc mesenteroides | A species found in fermenting vegetables and other plant materials and in prepared meat products; it is an active slime (dextran) producer, the dextran commonly used as a plasma expander; it is the type species of the genus Leuconostoc. (05 Mar 2000) |
| leucopenia | <haematology> Reduction in the number of leucocytes in the blood, the count being 5000 per cu. Mm. Or less. Origin: Gr. Penia = poverty (18 Nov 1997) |
| leucophane | <chemical> A mineral of a greenish yellow colour; it is a silicate of glucina, lime, and soda with fluorine. Synonym: leucophanite. Origin: Gr. Appearing bright or white; white + to show: cf. G.leukophan. Source: Websters Dictionary (01 Mar 1998) |
| leucopheresis | Method of separating blood into its liquid and cellular components and for the removal of white blood cells before returning the remainder of the blood to the patient. It is used to reduce the white cell count when chemotherapy is to be avoided, for example during pregnancy. (13 Nov 1997) |
| leucophlegmacy | <medicine> A dropsical habit of body, or the commencement of anasarca; paleness, with viscid juices and cold sweats. Origin: Gr.; white + phlegm: cf. F. Leucophlegmasie. Source: Websters Dictionary (01 Mar 1998) |
| leucophlegmatic | Having a dropsical habit of body, with a white bloated skin. Origin: Cf. F. Leucophlegmatique, Gr. Source: Websters Dictionary (01 Mar 1998) |
| 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) |
| 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) |