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Definition of vibrissa:

  1. One of the specialized or tactile hairs which grow about the nostrils, or on other parts of the face, in many animals, as the so- called whiskers of the cat, and the hairs of the nostrils of man.
  2. The bristlelike feathers near the mouth of many birds.


hair's-breadth, sensory hair, whisker, hairsbreadth, hair.