/mawr'feuh foh"neem, mawr'foh-/ , n. Ling.
1. an abstract phonological unit representing corresponding phonemes in different allomorphs of one morpheme. In English the symbol F may be used to represent a morphophoneme occurring in two related allomorphs, as f in leaf, but v in the plural leaves.
2. a phonological entity comprising a bundle of distinctive features used in the representation of a morpheme.
3. a symbol for a phonological alternation.
[ 1930-35; MORPHO- (as comb. form for MORPHEME) + PHONEME ]