Noun | 1. | zoomastigote - flagellate protozoan lacking photosynthesis and other plant-like characteristics flagellate, flagellate protozoan, flagellated protozoan, mastigophoran, mastigophore - a usually nonphotosynthetic free-living protozoan with whiplike appendages; some are pathogens of humans and other animals subclass Zoomastigina, Zoomastigina - in some classifications considered a phylum of the kingdom Protista; holozoic or saprozoic flagellates |