trich·o·cyst (tr k  -sst )n. A stinging or grasping organ in the outer cytoplasm of certain protozoans, especially ciliates, consisting of a threadlike or bristlelike filament that can be discharged suddenly from a minute capsule. trich o·cystic adj. |
trichocyst [ˈtrɪkəˌsɪst]
n
(Life Sciences & Allied Applications / Zoology) any of various cavities on the surface of some ciliate protozoans, each containing a sensory thread that can be ejected
trichocystic adj
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