[-otic] adj suffix [Gk -otikos, fr. -otos, ending of verbals, fr. -o- (stem of causative verbs in -oun) + -tos, suffix forming verbals--more at -ed]: of, relating to, or characterized by a (specified) action, process, or condition "symbiotic"
[2]-otic adj comb form [Gk otikos of the ear, fr. ot-, ous ear]: having (such) a relationship to the ear "dichotic"