'Ulva' definitions:
Definition of 'Ulva'
(from WordNet)
noun
Type genus of the family Ulvaceae; green seaweed having a thallus two cells thick: sea lettuce [syn: Ulva, genus Ulva]
Definition of 'Ulva'
From: GCIDE
- Ulva \Ul"va\, prop. n. [L., sedge.] (Bot.) A genus of thin papery bright green seaweeds including the kinds called sea lettuce. [1913 Webster]