Thiobacteriales
plural noun
Thio·bacteriales
"+
in some classifications
: an order of bacteria of various shapes usually containing either sulfur granules or bacteriopurpurin or both, usually thriving best in the presence of hydrogen sulfide, and comprising the families Achromatiaceae, Beggiatoaceae, and Rhodobacteriaceae
Word History
Etymology
New Latin, from Thiobacterium + -ales