鞭毛纲 biānmáogāng flagellate Origin Definitions Defs Strokes Stroke Words Sentences Sents 鞭毛 biānmáo flagellum a slender threadlike structure that allows many protozoa, bacteria, and spermatozoa to swim; literally "whip hair"纲 綱 gāng class A level in biological classification, ranking below phylum (门 mén) and above order (目 mù)