Heteronym (linguistics)
A heteronym (also known as a heterophone) is a word that has a different pronunciation and meaning as another word but the same spelling, that is, they are homographs but not homophones. Thus, lead (/lɛd/ the metal) and lead (/liːd/ a leash) are heteronyms, but mean (average) and mean (intend) are not, since they are both pronounced /miːn/.