Definition of morphophoneme in English:

morphophoneme

noun

Phonetics
  • A unit of sound from which all variants of a morpheme can be derived or predicted by rule.

    • ‘This tendency of leaving out the morphophoneme " t’ becomes more and more common.’
    • ‘Stress has its own tier, and I will identify this feature specifically, since stress will determine the choice of the morphophoneme.’
    • ‘They are complementary, since for each environment of the unit, its morphophonemes indicate the segments in the corresponding parts of that member of the morpheme which occurs in that environment.’

Pronunciation:

morphophoneme

/ˌmɔːfə(ʊ)ˈfəʊniːm/