Late 19th century; earliest use found in Philosophical Transactions of the Royal Society of London. From scientific Latin Medulloseae, former family-group name + -an.
Definition of medullosean in US English:
medullosean
adjectiveˌmɛdʌˈləʊsɪən
Botany
= medullosan.
Origin
Late 19th century; earliest use found in Philosophical Transactions of the Royal Society of London. From scientific Latin Medulloseae, former family-group name + -an.