from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A small knobbed structure in some two-winged insects, one of a pair that are flapped rapidly and function as accelerometers to maintain stability in flight.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. either of the rudimentary hind wings of dipterous insects; used for maintaining equilibrium during flight
Sorry, no etymologies found.
Calypter: Diptera; the alula or squama when it covers the haltere.