| megachile | <zoology> A leaf-cutting bee of the genus Megachilus. See Leaf cutter, under Leaf. Origin: Mega- + Gr. Lip. Source: Websters Dictionary (01 Mar 1998) |
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| megacins | Bacteriocins elaborated by mutant strains of bacillus megaterium. They are protein or protein-lipopolysaccharide complexes lethal to other strains of the same species. (12 Dec 1998) |
| megacoccus | A coccus of unusually large size. Synonym: macrococcus. (05 Mar 2000) |
| megacolon | An abnormally large or dilated colon, the condition may be congenital or acquired, acute or chronic. (18 Nov 1997) |
| megacolon, toxic | Acute dilatation of the colon associated with amebic or ulcerative colitis. The dilatation may precede perforation of the colon. (12 Dec 1998) |
| megacoulomb | <physics> A million coulombs. Origin: Mega- + coulomb. Source: Websters Dictionary (01 Mar 1998) |
| megacycle | One million cycles per second. (05 Mar 2000) |
| megacystic syndrome | <syndrome> A combination of a large smooth thin-walled bladder, vesicoureteral regurgitation, and dilated ureters. (05 Mar 2000) |
| megacystis | Pathologically large bladder in children. Synonym: megalocystis. Origin: mega-+ kystis, bladder (05 Mar 2000) |
| megacystitis-megaureter syndrome | <syndrome> Radiologic findings of a large capacity, thin-walled bladder and massive vesicoureteral reflux, without obstruction or underlying neuropathy or dysfunctional voiding. (05 Mar 2000) |
| megacystitis-microcolon-intestinal hypoperistalsis syndrome | <syndrome> A rare condition characterised by abdominal distention, lax abdominal musculature, incomplete intestinal rotation, and deficient intestinal peristalsis. A large bladder and often vesicoureteral reflux are seen. Typically affects female neonates and usually fatal in first year of life. (05 Mar 2000) |
| megadactyly | Condition characterised by enlargement of one or more digits (fingers or toes). Synonym: dactylomegaly, macrodactylia, macrodactylism, macrodactyly, megalodactylia, megalodactylism, megalodactyly. Origin: mega-+ G. Daktylos, digit (05 Mar 2000) |
| megaderm | <zoology> Any one of several species of Old World blood-sucking bats of the genus Megaderma. Origin: Mega- + Gr. Skin. Source: Websters Dictionary (01 Mar 1998) |
| megadolichocolon | Excessive length and dilation of colon. Origin: mega-+ G. Dolichos, long, + kolon, colon (05 Mar 2000) |
| megadont | Synonym: macrodont. Origin: mega-+ G. Odous (odont-), tooth (05 Mar 2000) |