Wiktionary
coal-tar
n. (alternative spelling of coal tar English)
Usage examples of "coal-tar".
This method is applicable to the large group of azo dye-stuffs derived from coal tar, and also to the acid dyes prepared from the basic coal-tar colours by the process of sulphonation.
The man still clung firmly to his relaxed sixties-era hippie ethics, principles and aesthetics-although he now owned the biggest and most profitable coal-tar dye works in Europe.
It was based in an evaporative solvent which was identified as a coal-tar derivative, but the purified sap was from an ancient Coccus lacca insect extinct for millennia.