n. [ Ar., Per. & Hind. tinkār; cf. Malay tingkal; all fr. Skr. &unr_;a&unr_;ka&unr_;a. Cf. Altincar. ] (Chem.) Crude native borax, formerly imported from Thibet. It was once the chief source of boric compounds. Cf. Borax. [ 1913 Webster ]