The Collaborative International Dictionary
Dipteral
Dipteral \Dip"ter*al\, a.
(Zo["o]l.) Having two wings only; belonging to the order Diptera.
(Anc. Arch.) Having a double row of columns on each on the flanks, as well as in front and rear; -- said of a temple.
Wiktionary
dipteral
a. 1 Having two wings only. 2 Belonging to the order of insects Diptera. 3 Having a double row of columns on each on the flanks, as well as in front and rear, often said of a temple.