noun.
A leguminous plant, Medicago sativa, a highly valuable pasture- and forage-plant, cultivated from ancient times, now widely spread in temperate climates.
the GNU version of the Collaborative International Dictionary of English
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
important European leguminous forage plant with trifoliate leaves and blue-violet flowers grown widely as a pasture and hay crop
Word Usage
"The grass called lucerne seems the best adapted to them, and you will find it grown on all ostrich farms for the special purpose of feeding the birds."