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

 

effector

 noun
noun
BrE BrE//ɪˈfektə(r)//
 
; NAmE NAmE//ɪˈfektər//
 
(biology)
 
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an organ or a cell in the body that is made to react by something outside the body
See the Oxford Advanced American Dictionary entry: effector