ALFALFA
alfalfa
(noun) leguminous plant grown for hay or forage
alfalfa, lucerne, Medicago sativa
(noun) important European leguminous forage plant with trifoliate leaves and blue-violet flowers grown widely as a pasture and hay crop
Source: WordNet® 3.1
Etymology
Noun
alfalfa (countable and uncountable, plural alfalfas)
(uncountable) A plant, principally of Medicago sativa, grown as a pasture crop.
Synonym: lucerne (British)
(countable) A type or breed of this plant.
Source: Wiktionary
Al*fal"fa, n. Etym: [Sp.] (Bot.)
Definition: The lucern (Medicago sativa); -- so called in California,
Texas, etc.
Source: Webster’s Unabridged Dictionary 1913 Edition