The Collaborative International Dictionary
Coccobacteria
Coccobacterium \Coc`co*bac*te"ri*um\, n.; pl. Coccobacteria. [NL., fr. Gr. ? a grain + NL. bacterium. So called from its round shape.] (Biol.) One of the round variety of bacteria, a vegetable organism, generally less than a thousandth of a millimeter in diameter.
Wiktionary
coccobacteria
n. (plural of coccobacterium English)