an·ti·bi·o·sis 
(ăn′tē-bī-ōsĭs, ăn′tī-)
(ăn′tē-bī-ōsĭs, ăn′tī-)n.
1. An association between two or more organisms that is detrimental to at least one of them.
2. The antagonistic association between an organism and the metabolic substances produced by another.