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tactile hair

noun
1.
any highly sensitive hair of an animal, as the whiskers of a cat or hairs on a hedgehog's snout.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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tactile hair in Science
tactile hair  
A hair or hairlike structure that is highly sensitive to pressure or touch. Tactile hairs help organisms sense their environment. They cover the bodies of most insects and are found in many mammals, especially as whiskers.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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