what is anaerobic
anÂ·aerÂ·oÂ·bic. Relating to an anaerobe; living without dioxygen. anaerobic. 1. lacking molecular oxygen. 2. growing, living, or occurring in the absence of molecular oxygen; pertaining to an anaerobe. anaerobic. adj. 1. Living or occurring in the absence of free oxygen: anaerobic bacteria. 2. Of or relating to anaerobes.