garancinChem.|ˈgærənsɪn| Also -ine. [a. F. garancine, f.garance madder: see -in.] A dyeing substance obtained from madder. 1843F. Steiner Patent in Ure Dict. Arts (1853) I. 841 Garancine.1872Oliver Elem.Bot. ii. 190 Garancine..prepared from Madder by the action of sulphuric acid.