(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.

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