bəˌjad.əˈwā(ˌ)lēz noun plural
Usage: capitalized
Etymology: New Latin, from Beggiatoa + -ales
: an order of free-living bacteria having relatively large rigid cells often in filaments, lacking flagella and moving by gliding like some of the blue-green algae, and often containing sulfur granules within or on the surface of the cells — see beggiatoa