plural acicula
or aciculums
: a needlelike spine or bristle of an animal or plant : acicula
specifically : one of the stiff setae in the base of a parapodium of an annelid

Word History


New Latin, alteration of Late Latin acicula small pin for a headdress

First Known Use

1867, in the meaning defined above

Time Traveler
The first known use of aciculum was in 1867

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Dictionary Entries Near aciculum

Cite this Entry

“Aciculum.” Dictionary, Merriam-Webster, Accessed 21 May. 2024.

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