catechu in British English
(ˈkætɪˌtʃuː), cachou or cutch
nouna water-soluble astringent resinous substance obtained from any of certain tropical plants, esp the leguminous tree Acacia catechu of S Asia, and used in medicine, tanning, and dyeing
See also gambier Word origin
C17: probably from Malay
kachu, of Dravidian origin