amphid

noun
am·​phid | \ˈamfə̇d\
plural -s

Definition of amphid 

: one of a pair of circular depressions situated laterally at the anterior end of aquatic nematodes and believed to be chemoreceptors

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First Known Use of amphid

1873, in the meaning defined above

History and Etymology for amphid

Greek amphidea anything that is bound around

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The first known use of amphid was in 1873

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