Pronunciation: (dip'tur-us), [key]
1. Entomol.belonging or pertaining to the order Diptera, comprising the houseflies, mosquitoes, and gnats, characterized by a single, anterior pair of membranous wings with the posterior pair reduced to small, knobbed structures.
2. Bot.having two winglike appendages, as seeds or stems.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.