one of a pair of appendages at the rear of the abdomen of certain insects and other arthropods, serving as tactile organs.
Historical Examples

noun (pl) -ci (-siː)
one of a pair of sensory appendages at the tip of the abdomen of some insects and other arthropods

cercus cer·cus (sûr’kəs)
n. pl. cer·ci (sûr’sī, -kī)

A stiff hairlike structure.

Either of a pair of terminal, dorsolateral sensory appendages of certain insects, such as the female mosquito.


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