Definition

Dioxin, [noun] die-ox-in: Any in a family of over 200 chlorinated organic chemicals. The term is most commonly applied to
a particular chemical, 2,3,7,8-tetrachlorodibenzo-paradioxin which
is an impurity in the defoliant Agent Orange. Dioxins are known
to cause skin diseases, birth defects, miscarriages, and cancer.


Residue, [noun] rez-i-doo: Something left after other parts have been taken away; "there was no remainder"; "he threw away the rest".

or

Matter that remains after something has been removed.