Definition of megasea in US English:

megasea

noun

historical
  • A plant of the genus Megasea (now included in the genus Bergenia); a bergenia.

Origin

Late 19th century; earliest use found in Encyclopaedia Britannica. From scientific Latin Megasea, genus name from ancient Greek μέγας large, in reference to the large leaves of the plant + -ea, element of arbitrary origin.

Pronunciation

megasea

/mɪˈɡasɪə/