Noun | 1. | hypermastigote - flagellate symbiotic in the intestines of e.g. termites flagellate, flagellate protozoan, flagellated protozoan, mastigophoran, mastigophore - a usually nonphotosynthetic free-living protozoan with whiplike appendages; some are pathogens of humans and other animals Hypermastigina, order Hypermastigina - cellulose-producing flagellates |