| Urea (n.) A very soluble crystalline body which is the chief constituent of the urine in mammals and some other animals. It is also present in small quantity in blood, serous fluids, lymph, the liver, etc. Thesaurus Entries Bakelite, Buna, Celluloid, Formica, Lucite, Mylar, PVC, Perspex, Plexiglas, Styrofoam, Teflon, acetate, acetate nitrate, alkyd, aminoplast, casein plastic, cellophane, cellulose acetate, cellulose ether, cellulose nitrate, cellulosic, coumarone-indene, epoxy, fluorocarbon plastic, furane, lignin, melamine, multiresin, neoprene, nitrate, nylon, phenolic urea, polyester, polymeric amide, polypropylene, polystyrene, polyvinyl chloride, resinoid, silicone resin, tetrafluoroethylene, urea, urea formaldehyde, vinyl |