aphonic,a.rare.|əˈfɒnɪk| [f. as next + -ic.] Having no sound or pronunciation, non-vocal. 1827Edin.Rev. XLV. 533 These [hieroglyphics] he divides into Emphonic, Symphonic, and Aphonic.1877Roberts Handbk.Med. I. 353 Voice is completely lost, and cough becomes aphonic.