Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A sensory receptor that responds to pain.

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

  • noun A sensory receptor that sends signals that cause the perception of pain in response to a potentially damaging stimulus.

Etymologies

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

[Latin nocēre, to hurt; see nocent + (re)ceptor.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin nocēre ("to hurt") + contracted form of (re)ceptor

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