green laver (under laver), sea-lettuce (under lettuce), and Enteromorpha." />
Ulva
The Century Dictionary and Cyclopedia
noun.
A genus of algæ, typical of the order Ulvaceæ, having a flat membranaceous bright-green frond. U. latissima and U. Lactuca are sometimes eaten. See green laver (under laver), sea-lettuce (under lettuce), and Enteromorpha.
the GNU version of the Collaborative International Dictionary of English
proper noun.
A genus of thin papery bright green seaweeds including the kinds called sea lettuce.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
type genus of the family Ulvaceae; green seaweed having a thallus two cells thick: sea lettuce