| derotremata | <zoology> The tribe of aquatic Amphibia which includes Amphiuma, Menopoma, etc. They have permanent gill openings, but no external gills. Synonym: Cryptobranchiata. Alternative forms: Derotrema. Origin: NL, fr. Gr. Skin +, hole. Source: Websters Dictionary (01 Mar 1998) |
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| derring | Daring or warlike. "Drad for his derring doe and bloody deed." (Spenser) Source: Websters Dictionary (01 Mar 1998) |
| derris | 1. Derris: a tropical shrub in the legume family. 2. An insecticidecontaining rotenone (tubatoxin), a chemical extracted from the derrisshrub. (09 Oct 1997) |
| dertrotheca | <ornithology> The horny covering of the end of the bill of birds. Origin: NL, fr. Gr. Beak + box, case. Source: Websters Dictionary (01 Mar 1998) |
| Derzsy's disease | An acute, highly fatal disease of goslings and Muscovy ducklings caused by the goose parvovirus and characterised by anorexia, feather loss, and tissue haemorrhages. Synonym: Derzsy's disease. (05 Mar 2000) |