Mid 19th century; earliest use found in Constantine Rafinesque (1783–1840). From mono- + sperm. Compare French monosperme, adjective, Italian monospermo, adjective.
Definition of monosperm in US English:
monosperm
adjectiveˈmɒnə(ʊ)spəːm
Botany rare
= monospermous.
Origin
Mid 19th century; earliest use found in Constantine Rafinesque (1783–1840). From mono- + sperm. Compare French monosperme, adjective, Italian monospermo, adjective.