toxicyst

toxicyst
toxi·cyst (tokґsĭ-sist) [toxi- + cyst] one of the numerous toxic subpellicular organelles occurring as slender extrusible tubular structures located apically in certain ciliate protozoa, especially certain of the Kinetofragminophorea, with which the organism penetrates the body of and cytolyzes its prey. Cf. trichocyst.

Medical dictionary. 2011.

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  • trichocyst — trichocystic, adj. /trik euh sist /, n. Zool. 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. [1850 55;… …   Universalium

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