| mega- | <physics, prefix> Metric prefix indicating 1,000,000 times a given quantity. For example, a megawatt is 1,000,000 watts. (29 Oct 1998) |
|---|---|
| mega-oesophagus | <radiology> Achalasia, Chagas disease, idiopathic pseudo-obstruction, amyloidosis, Ehlers-Danlos syndrome, presbyesophagus (uncommon), oesophageal dysmotility (usually mild to moderate dilatation) (12 Dec 1998) |
| megabacterium | A bacterium of unusually large size. Synonym: macrobacterium. (05 Mar 2000) |
| megabase | <molecular biology, unit> Unit of length for DNA fragmentsequal to 1million nucleotides androughly equal to 1 cM. (29 Oct 1998) |
| megabase cloning | <molecular biology> The cloning of very large DNA fragments. (29 Oct 1998) |
| megacalycosis | 1. Congenital, nonobstructive enlargement of renal calices. 2. Excessively large number of calices. Origin: mega-+ G. Kalyx, cup of a flower, + -osis, condition (05 Mar 2000) |
| megacardia | <cardiology, clinical sign> Cardiac hypertrophy. Origin: Gr. Megas = large (18 Nov 1997) |
| megacaryoblast | The precursor of a megakaryocyte. Synonym: megacaryoblast. (05 Mar 2000) |
| megacaryocyte | <haematology> Giant polyploid cell of bone marrow that gives rise to 3-4,000 platelets. (18 Nov 1997) |
| megacephalia | A condition, either congenital or acquired, in which the head is abnormally large; usually applied to an adult skull with a capacity of over 1450 ml. Synonym: leontiasis ossea, macrocephaly, macrocephalia, megacephalia, megalocephaly, megalocephalia, Virchow's disease. Origin: mega-+ G. Kephale, head (05 Mar 2000) |
| megacephalic | <biology> Large headed; applied to animals, and to plants when they have large flower heads. Origin: Mega- Gr. Head. Source: Websters Dictionary (01 Mar 1998) |
| megacephalous | <biology> Large headed; applied to animals, and to plants when they have large flower heads. Origin: Mega- Gr. Head. Source: Websters Dictionary (01 Mar 1998) |
| megacephaly | A condition, either congenital or acquired, in which the head is abnormally large; usually applied to an adult skull with a capacity of over 1450 ml. Synonym: leontiasis ossea, macrocephaly, macrocephalia, megacephalia, megalocephaly, megalocephalia, Virchow's disease. Origin: mega-+ G. Kephale, head (05 Mar 2000) |
| megaceros | <paleontology> The Irish elk. Origin: NL, fr. Gr. Megas great + horn. Source: Websters Dictionary (01 Mar 1998) |
| 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) |