(in Arthurian legend) the mythical birthplace of Sir Tristram, situated in SW England and believed to have been submerged by the sea
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Ly•on•nesse
(lī′ə nes′),USA pronunciation n. [Arthurian Romance.]
- Mythologythe mythical region where Sir Tristram was born, located near Cornwall in SW England and supposed to have been submerged by the sea.
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