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The Collaborative International Dictionary
Monospermous

Monospermal \Mon`o*sper"mal\, Monospermous \Mon`o*sper"mous\, a. [Mono- + Gr. spe`rma seed: cf. F. monosperme.] (Bot.) Having only one seed.

Wiktionary
monospermous

a. (context botany English) Having only one seed.