Late 19th century; earliest use found in Bulletin of the Torrey Botanical Club. From pro- + ancient Greek ϕύλλον leaf + -um, after Latin nouns with this ending.
Definition of prophyllum in US English:
prophyllum
(also prophyllon)
nounprəʊˈfɪləm
Botany
= prophyll.
Origin
Late 19th century; earliest use found in Bulletin of the Torrey Botanical Club. From pro- + ancient Greek ϕύλλον leaf + -um, after Latin nouns with this ending.