Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A specialized organ or structure, such as the eye, ear, tongue, nose, or skin, where sensory neurons are concentrated and that functions as a receptor. Also called sensor.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. an organic sensor.

from the GNU version of the Collaborative International Dictionary of English

  • n. a specially irritable mechanism by which some one natural force or form of energy is enabled to excite sensory nerves; as the eye, ear, an end bulb or tactile corpuscle, etc.

from The Century Dictionary and Cyclopedia

  • n. Any organ of sense, as the eye, ear, or nose.
  • n. Specifically, a collection of nerve-cells which receive impressions from without (peripheral sense-organ), such as one of the taste-bulbs or tactile corpuscles; also a collection of nerve-cells in the cerebrospinal centers which translate such impressions into conscious sensation or reflex movement (central sense-organ).

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

  • n. an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation

Etymologies

Attested from 1850–55 (Wiktionary)

Examples

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