adj 1 a  :  living, active, or occurring in the absence of free oxygen <during heavy exercise respiration occurs, pyruvic acid acts as a hydrogen acceptor, and lactic acid builds up in the tissues>   b  :  of, relating to, or being activity in which the body incurs an oxygen debt < exercise>   2  :  relating to or induced by anaerobes an*aer*o*bi*cal*ly adv 
 
    
 
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