- spirochete, spirochaete - parasitic or free-living bacteria; many pathogenic to humans and other animals
--1 is a kind of eubacteria, eubacterium, true bacteria
--1 is a member of Spirochaetales, order Spirochaetales
--1 has particulars:treponema; borrelia; Borrelia burgdorferi, Lime disease spirochete; leptospira