any of several astringent substances obtained from various tropical plants, esp. from the wood of two East Indian acacias, Acacia catechu and A. suma: used in medicine, dyeing, tanning, etc.
Origin: 1670–80; < NL < Pg; perh. a conflation of Marathi kāt catechu and kāccu, with same sense, alleged to be < Malayalam; cashoo, cutch perh. < Malay kacu < Malayalam, or a cognate Dravidian word
Main Entry: cat·e·chu Pronunciation: 'kat-&-"chü, -"shü Function: noun : any of several dry, earthy, or resinous astringentsubstances obtained from tropical plants of Asia: as a: an extract of the heartwood of an East Indian acacia (Acacia catechu) that was formerly used in medicine b:GAMBIER