a. [ Pref. an-not + aërobic. ] 1. (Biol.) Not requiring air or oxygen for life; -- applied especially to those microbes to which free oxygen is unnecessary; anaërobiotic; -- opposed to aërobic. [ Webster 1913 Suppl. ]
2. (Biol.) Relating to, or like, anaërobies; anaërobiotic. [ 1913 Webster ]