trichocyst [trik-uh-sist] Word Origin noun Zoology.

  1. an organ of offense and defense embedded in the outer cytoplasm of certain protozoans, consisting of a small elongated sac containing a fine, hairlike filament capable of being ejected.

Origin of trichocyst First recorded in 1850–55; tricho- + cyst Related formstrich·o·cyst·ic, adjective British Dictionary definitions for trichocyst trichocyst noun

  1. any of various cavities on the surface of some ciliate protozoans, each containing a sensory thread that can be ejected

Derived Formstrichocystic, adjective

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