| any of several lemon-scented grasses of the genus Cymbopogon, esp. C. citratus, of tropical regions, yielding lemon-grass oil. |
lem·on·grass also lemon grass  (lěm'ən-grās')  n. A tropical grass (Cymbopogon citratus) native to southern India and Sri Lanka, yielding an aromatic oil used as flavoring and in perfumery and medicine. |