From WordNet (r) 3.0 (2006): Ulva n 1: type genus of the family Ulvaceae; green seaweed having a thallus two cells thick: sea lettuce [syn: Ulva, genus Ulva]
Ulva n 1: type genus of the family Ulvaceae; green seaweed having a thallus two cells thick: sea lettuce [syn: Ulva, genus Ulva]
