Definitions for ulvaˈʌl və
Random House Webster's College Dictionary
any bright green seaweed of the genus Ulva, family Ulvaceae, growing in large flat sheets.
Origin of ulva:
1705–15; < NL; L
Ulva, genus Ulva(noun)
type genus of the family Ulvaceae; green seaweed having a thallus two cells thick: sea lettuce
A small island in the Inner Hebrides
a genus of thin papery bright green seaweeds including the kinds called sea lettuce
U.S. National Library of Medicine
A genus of GREEN ALGAE in the family Ulvaceae. Commonly know as sea lettuces, they grow attached to rocks and KELP in marine and estuarine waters.