† intincˈtivityObs.rare—1. [Compounded of in-3 + L. tinct-, ppl. stem of tingĕre to dye + -ive + -ity: prob. after inactivity.] The quality of not communicating colour. 1794Kirwan Elem.Min. I. 200 Fullers earth is distinguished from..colorific earths, by its intinctivity.