Of or pertaining to perchlorobenzoic acid or its derivatives

(organic chemistry) The fully chlorinated derivative of benzoic acid; pentachlorobenzoic acid.

(organic chemistry) Describing any fully chlorinated heteroaromatic compound

plural of percher

A draught horse of a large, strong, usually dapple-grey breed originating in Perche, a former district of France.

plural of Percheron

plural of gutta-percha

(chemistry) A certain highly oxidized compound of chromium, with a deep blue colour, and produced by the action of hydrogen peroxide.

Mirex.

(archaic) third-person singular simple present indicative form of perch