“+ noun
Etymology: International Scientific Vocabulary thi- + urea
: a bitter crystalline compound CS(NH 2 ) 2 that is analogous to urea with the oxygen replaced by sulfur and resembles urea in chemical properties, that is obtained by heating ammonium thiocyanate or by adding hydrogen sulfide to cyanamide, and that is used chiefly in the separation of hydrocarbons (as various liquid normal paraffin hydrocarbons from branched-chain hydrocarbons), in organic synthesis, and especially formerly in synthetic resins