|mȯ(r)fō+ noun
Etymology: morpho- (from morpheme ) + phoneme
: a class of phonemes that belong to the same morpheme (as the -s, -z, -ə̇z plural suffix of kits, kids, kisses; f, v in knife, knives ) ; also : an arbitrarily selected member of such a class as its representative in grammatical description (as the plural suffix -s , or the f in nīf)
group together into one morphophoneme the phonemes which replace each other in corresponding parts of the various members of a morpheme — Z.S.Harris