Anaerobic \An*a`["e]*rob"ic\, a. [Pref. an-not + a["e]robic.] (Biol.) Not requiring air or oxygen for life; -- applied especially to those microbes to which free oxygen is unnecessary; ana["e]robiotic; -- opposed to a["e]robic.
Source: Webster's Revised Unabridged Dictionary (1913)
Anaerobic \An*a`["e]*rob"ic\, a. (Biol.) Relating to, or like, ana["e]robies; ana["e]robiotic.