Entomology. 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.
Botany. having two winglike appendages, as seeds or stems.
Also dipteran. of, relating to, or belonging to the Diptera, a large order of insects having a single pair of wings and sucking or piercing mouthparts. The group includes flies, mosquitoes, craneflies, and midges
(botany) having two winglike parts: a dipterous seed
C18: from New Latin, from Greek dipteros, from di- two + pteros wing