Block tin (Metal.), commercial tin, cast into blocks, and partially refined, but containing small quantities of various impurities, as copper, lead, iron, arsenic, etc.; solid tin as distinguished from tin plate; -- called also bar tin. -- Butter of tin. (Old Chem.) See Fuming liquor of Libavius, under Fuming. -- Grain tin. (Metal.) See under Grain. -- Salt of tin (Dyeing), stannous chloride, especially so called when used as a mordant. -- Stream tin. See under Stream. -- Tin cry (Chem.), the peculiar creaking noise made when a bar of tin is bent. It is produced by the grating of the crystal granules on each other. -- Tin foil, tin reduced to a thin leaf. -- Tin frame (Mining), a kind of buddle used in washing tin ore. -- Tin liquor, Tin mordant (Dyeing), stannous chloride, used as a mordant in dyeing and calico printing. -- Tin penny, a customary duty in England, formerly paid to tithingmen for liberty to dig in tin mines. [Obs.] Bailey. -- Tin plate, thin sheet iron coated with tin. -- Tin pyrites. See Stannite.