- (TCDD) 2,3,7,8-tet·ra·chlo·ro·di·ben·zo-p-di·ox·in (TCDD) (tet″rə-klor″o-di-ben″zo-di-okґsin) a teratogenic and carcinogenic dioxin that contaminates the herbicide 2,4,5-T.
Medical dictionary. 2011.
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