Definitions

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

Etymologies

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