n. (Chem.) A substance of variable composition, but resembling a soft, dark-colored metal, used in the bearings of machines for obviating friction, and as a substitute for lubricants. [ 1913 Webster ]

a. [ Cf. F. métallin. ] (Chem.) (a) Pertaining to, or resembling, a metal; metallic; as, metalline properties. (b) Impregnated with metallic salts; chalybeate; as, metalline water. [ R. ] [ 1913 Webster ]