Wiktionary
a. (context chemistry English) Having many hydrogen atoms replaced by chlorine.
Wikipedia
Usage examples of "polychlorinated".
TCDD belongs to a class of similar compounds that are known as polychlorinated dibenzodioxins.
So polychlorinated biphenyl and polychlorinated dibenzodioxin are structurally similar compounds.
PCB: Polychlorinated biphenyls, a group of organic compounds notorious for their deposition and accumulation in polar environments, as by arctic distillation.
The onboard incinerators could achieve Fahrenheit temperatures above 2500 degrees, hot enough to dispose of even the dreaded chemical polychlorinated biphenyls, PCBs.
General Electric to clean up the polychlorinated biphenyls that the company has dumped into the river for decades.
General Electric to clean up the polychlorinated biphenyls that the company has dumped into the river for decades.
It may be a little too simple-minded to make the extremist possible assumption-that it'll convert all the salt in the earth's oceans to polychlorinated biphenyls.
Makes some pretty lethal side products, too–chlorinated benzenes, polychlorinated biphenyls, all kinds of crap.
In both cases you've got a bunch of chlorine atoms, which is why it's called polychlorinated, and an organic structure that they're carried around on.