al·lo·phone \ˈaləˌfōn\noun (-s) Etymology:allo- (II) + phone : one of two or more articulatorily and acoustically different forms of the same phoneme < the aspirated p of pin and the nonaspirated p of spin are allophones of the phoneme p > — compare phone, phoneme • al·lo·phon·ic\|alə|fänik, -ēk\adjective