Tombac \Tom"bac\, n. [Pg. tambaca,tambaque, fr. Malay tamb[=a]ga copper; cf. Skr. t[=a]mraka; cf. F. tombac.]

(Metal.) An alloy of copper and zinc, resembling brass, and containing about 84 per cent of copper; -- called also German, or Dutch, brass. It is very malleable and ductile, and when beaten into thin leaves is sometimes called Dutch metal. The addition of arsenic makes white tombac. [Written also tombak, and tambac.]

Source: Webster's Revised Unabridged Dictionary (1913)