from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An accessory plume arising from the posterior of the contour feathers of many birds.
from the GNU version of the Collaborative International Dictionary of English
- n. The hypoptilum.
from The Century Dictionary and Cyclopedia
- n. In ornithology: A supplementary feather growing out of a feather; the hypoptilum.
- n. The shaft of such a supplementary feather. Also called hyporachis.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a supplementary feather (usually small) on the underside of the base of the shaft of some feathers in some birds
Sorry, no etymologies found.