Ulva ululu • Ulvaceae · · · Info · Definitions · Characters · · Ulva · · Text Latin · · Script 4 · · Length Definitions · · · (noun) type genus of the family Ulvaceae; green seaweed having a thallus two cells thick: sea lettuce. Synonyms: genus Ulva. · · Noun Definition 1 Characters · · U latin capital letter u U+0055 a latin small letter a U+0061 l latin small letter l U+006C v latin small letter v U+0076