TCDD
noun
ˌtē-(ˌ)sē-(ˌ)dē-ˈdē 
: a carcinogenic dioxin C12H4O2Cl4 found especially as a contaminant in 2,4,5-T
Word History
Etymology
tetra- + chlor- + dibenzo- (containing two benzene rings) + dioxin
First Known Use
1971, in the meaning defined above
Medical Definition
TCDD
noun
ˌtē-ˌsē-ˌdē-ˈdē
: a carcinogenic dioxin C12H4O2Cl4 found especially as a contaminant in 2,4,5-T
called also 2,3,7,8-tetrachlorodibenzo-para-dioxin, 2,3,7,8-tetrachlorodibenzo-p-dioxin