| melanotropin-releasing hormone | A hexapeptide similar to oxytocin; it stimulates the release of melanotropin. Synonym: melanotropin-releasing factor, melanotropin-releasing hormone. Origin: melanotropin + L. Libero, to free, + -in (05 Mar 2000) |
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| melanotype | <photography> A positive picture produced with sensitized collodion on a smooth surface of black varnish, coating a thin plate of iron; also, the process of making such a picture. Alternative forms: melainotype. Origin: Gr, black + -type. Source: Websters Dictionary (01 Mar 1998) |
| melanterite | <chemical> A hydrous sulphate of iron of a green colour and vitreous luster; iron vitriol. Source: Websters Dictionary (01 Mar 1998) |
| melanure | <zoology> A small fish of the Mediterranean; a gilthead. See Gilthead . Origin: NL. Melanurus, fr. Gr, black + tail. Source: Websters Dictionary (01 Mar 1998) |
| melanuria | The excretion of urine of a dark colour, resulting from the presence of melanin or other pigments or from the action of phenol, creosote, resorcin, and other coal tar derivatives. Origin: melano-+ G. Ouron, urine (05 Mar 2000) |
| melanuric | <chemistry> Pertaining to, or designating, a complex nitrogenous acid obtained by decomposition of melam, or of urea, as a white crystalline powder. Synonym: melanurenic acid. Origin: Melam + urea. Source: Websters Dictionary (01 Mar 1998) |
| melaphyre | <chemical> Any one of several dark-coloured augitic, eruptive rocks allied to basalt. Origin: F, fr. Gr, black + porphyre porphyry. Source: Websters Dictionary (01 Mar 1998) |
| melarsoprol | <chemical> Arsenical used in trypanosomiases. It may cause fatal encephalopathy and other undesirable side effects. Pharmacological action: trypanocidal agents. Chemical name: 1,3,2-Dithiarsolane-4-methanol, 2-(4-((4,6-diamino-1,3,5-triazin-2-yl)amino)phenyl)- (12 Dec 1998) |
| MELAS | An acronym for mitochondrial myopathy, encephalopathy, lactacidosis, and stroke; an inherited disorder of the respiratory chain, either a deficiency of NADH:ubiquinone oxidoreductase (complex I of the chain) or of cytochrome c oxidase. (05 Mar 2000) |
| melas syndrome | <syndrome> A major subgroup of the mitochondrial encephalomyopathies characterised by mitochondrial myopathy, encephalopathy, lactic acidosis, and stroke-like episodes. It has been diagnosed in all age groups. (12 Dec 1998) |
| melasma | <medicine> A dark discolouration of the skin, usually local; as, Addison's melasma, or Addison's disease. Melasmic. Origin: NL, fr. Gr. Black spot. Source: Websters Dictionary (01 Mar 1998) |
| melasma gravidarum | Chloasma occurring in pregnancy. (05 Mar 2000) |
| melasma universale | senile melanoderma |
| melassic | <chemistry> Pertaining to, or designating, an acid obtained from molasses or glucose, and probably identical with saccharic acid. See Saccharic. See: Molasses. Source: Websters Dictionary (01 Mar 1998) |
| melastoma | <botany> A genus of evergreen tropical shrubs; so called from the black berries of some species, which stain the mouth. Origin: Gr. Mela = black, stoma = mouth. (06 Mar 1998) |