Pronunciation: (môr"fu-fō'nēm, môr"fō-), [key]
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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.