Definitions

from The Century Dictionary.

  • noun In ornithology: A supplementary feather growing out of a feather; the hypoptilum.
  • noun The shaft of such a supplementary feather. Also called hyporachis.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Zoöl.) The hypoptilum.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun ornithology An accessory plume arising from the posterior of the contour feathers of many birds.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun 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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Examples

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