cocheˈnillin Also cochenelin. [f.cochenille, cochineal + -in.] The colouring matter of cochineal, carmine. 1819J. G. Children Chem.Anal. 309 Cochenelin is the name given by Dr. John to the red colouring matter of the cochineal insect.1882Syd. Soc.Lex., Cochenilline, a synonym of Carmine.