noun Spi·ro·de·la \ˌspīrəˈdēlə\

Definition of Spirodela

  1. :  a genus of aquatic plants (family Lemnaceae) having a membranous spathe and a thallus with a cluster of several rootlets — see great duckweed

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Origin and Etymology of spirodela

New Latin, from spir- + -dela (from Greek dēlos visible, evident); from the fact that the spiral vessels are visible through the transparent tissues — more at adel-

Seen and Heard

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a rounded knoll or a ridge of ice

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