1. A usually nonphotosynthetic free-living protozoan with whiplike appendages; some are pathogens of humans and other animals
   "Giardia is a flagellate protozoan that can cause intestinal infections";
   - flagellate, flagellated protozoan, mastigophoran, mastigophore

Derived forms: flagellate protozoa

Type of: protozoan, protozoon

Part of: class Flagellata, class Mastigophora, Flagellata, Mastigophora