The Collaborative International Dictionary of English v.0.48:
introvertive \introvertive\ adj. same as introverted, 2. Syn: introvert, introverted. [WordNet 1.5 +PJC]WordNet (r) 3.0 (2006):
introvertive adj 1: directed inward; marked by interest in yourself or concerned with inner feelings [syn: introversive, introvertive] [ant: ambiversive, extraversive, extroversive]