Definition of monomorphemic in English:

monomorphemic

adjective

Linguistics
  • Consisting of a single morpheme.

    • ‘It would seem that the high-frequency past tenses were being processed rather like the monomorphemic words, suggesting that they were being stored as preformed units.’
    • ‘In assigning the heavier weight to the following consonant and the lighter one to the morpheme boundary, the model predicts that more deletions will occur in monomorphemic than bimorphemic clusters.’

Pronunciation:

monomorphemic

/ˌmɒnə(ʊ)mɔːˈfiːmɪk/