ˈcoal tar BrE AmE noun [uncountable]
a thick black sticky liquid made by heating coal without air, from which many drugs and chemical products are made:
coal tar soap
ˈcoal tar BrE AmE noun [uncountable]
a thick black sticky liquid made by heating coal without air, from which many drugs and chemical products are made:
coal tar soap
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012