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auriculars (plural only)

  1. (zoology) A circle of feathers surrounding the opening of the ear of birds.
    • 1937, The Emu: Official Organ of the Australasian Ornithologists' Union
      The more inland, lighter race is distinguished from A. u. uropygialis in being much paler on the back, by the edgings of the forehead scallopings and auriculars being paler, and by having the brown of the forehead less deep and less rufescent.