'monomorphic-fruited' originates from a combination of Greek and Old French/Latin elements: 'monomorphic' from Greek, specifically the roots 'monos' and 'morphē', where 'monos' meant 'single' and 'morphē' meant 'form'; 'fruited' derives from Old French 'fruit', ultimately from Latin 'fructus', where 'fructus' meant 'produce' or 'enjoyment'.

'monomorphic' was formed in New Latin/scientific usage from the Greek roots and entered English as a technical adjective in biological descriptions; 'fruited' is an English adjective formed from the noun 'fruit' (Old French 'fruit' < Latin 'fructus'). The compound adjective 'monomorphic-fruited' arose in botanical and taxonomic contexts to describe plants with fruit of a single form.

Initially, 'monomorphic' simply meant 'single form' (from Greek) and 'fruited' meant 'having fruit'; over time, the compound came to be used in specialized biological contexts to mean 'having fruits of one morphological type'.