trichocyst [trik-uh-sist] Word Origin noun Zoology.
- 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
- any of various cavities on the surface of some ciliate protozoans, each containing a sensory thread that can be ejected
Derived Formstrichocystic, adjective