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| Definition: | [n] type genus of the family Ulvaceae; green seaweed having a thallus two cells thick: sea lettuce | ||
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| Synonyms: | genus Ulva | ||
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| See Also: | family Ulvaceae, laver, protoctist genus, sea lettuce, sea-lettuce family, Ulvaceae | ||
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| Definition: | \Ul"va\, n. [L., sedge.] (Bot.) A genus of thin papery bright green seaweeds including the kinds called sea lettuce. | ||
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