Main Entry: al·lo·phone

Pronunciation: \ˈa-lə-ˌfōn\

Function: noun

Etymology: allo- + phone

Date: 1938

: one of two or more variants of the same phoneme <the aspirated \p\ of pin and the unaspirated \p\ of spin are allophones of the phoneme \p\>

— al·lo·phon·ic \ˌa-lə-ˈfä-nik\ adjective