cytostome


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to cytostome: cytopyge

cytostome

[′sīd·ə‚stōm]
(invertebrate zoology)
The mouth-like opening in many unicellular organisms, particularly Ciliophora.
References in periodicals archive ?
Flagellum A filament that usually projects from the body of an organism; functions as an organelle of locomotion or when in the groove in the cytostome causes movement of fluid; flagella is plural.
Predatory morphs typically have enlarged cell sizes and a larger cytostome (the cellular equivalent of a mouth).
Contributing to this is a transformation in trophic modes with the reduction (in Spironucleus species) and loss (in species of Octomitus and Giardia) of a cytostome, necessary for the ingestion of bacterial prey.