Early 19th century; earliest use found in Curtis's Botanical Magazine. From scientific Latin Nelumbium (A. L. de Jussieu Genera Plantarum 68) from nelumbo + -ium.
Definition of Nelumbium in US English:
Nelumbium
nounnɪˈlʌmbɪəm
Botany
Nelumbo.
Origin
Early 19th century; earliest use found in Curtis's Botanical Magazine. From scientific Latin Nelumbium (A. L. de Jussieu Genera Plantarum 68) from nelumbo + -ium.