noun
: any of numerous sulfur bacteria (as of the family Thiorhodaceae) appearing reddish or purplish due to the combination of bacteriochlorophyll and carotenoid pigments in the cell
noun
: any of numerous sulfur bacteria (as of the family Thiorhodaceae) appearing reddish or purplish due to the combination of bacteriochlorophyll and carotenoid pigments in the cell
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012