al·lo·phone 
(ălə-fōn′)
(ălə-fōn′)n.
1. Linguistics A predictable phonetic variant of a phoneme. For example, the aspirated t of top, the unaspirated t of stop, and the tt (pronounced as a flap) of batter are allophones of the English phoneme /t/.
2. or Allophone Canadian A person whose native language is other than French or English.
[ALLO- + PHONE(ME).]
al′lo·phonic (-fŏnĭk) adj.
al′lo·phoni·cal·ly adv.