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One of a number of structures, in the form of minute elongated cysts, arranged radially around the periphery of a protozoan cell and containing fluid that when discharged serves for offense or defense; found in ciliates, such as Paramecium species.
[tricho- + G. kystis, bladder]
An organelle in certain protozoans, especially ciliates, consisting of filamentous fibers that are discharged suddenly.
trichocyst(1) Trichilemmal cyst, see there.
(2) An elongated vesicular structure found in ciliate protozoa, which contains toxic substances used for defence.