Definition of antibody noun from the Oxford Advanced Learner's Dictionary

 

antibody

 noun
noun
BrE BrE//ˈæntibɒdi//
 
; NAmE NAmE//ˈæntibɑːdi//
 
(pl. antibodies) Cell biology
 
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a substance that the body produces in the blood to fight disease, or as a reaction when certain substances are put into the body See related entries: Cell biology Word Origin early 20th cent.: from anti- + body, translating German Antikörper, from anti- ‘against’ + Körper ‘body’.
See the Oxford Advanced American Dictionary entry: antibody