ˈsānˌfȯin noun
or san·foin ˈsan-
( -s )
Etymology: French sainfoin, from Middle French, from sain healthy (from Latin sanus healthy, sane) + foin hay, from Latin fenum, faenum; from its use as a medicinal herb — more at sane , fennel
1. : a Eurasian perennial herb ( Onobrychis viciaefolia ) having pinnate leaves and spicate pink flowers
2. : an American tick trefoil ( Desmodium canadense )
3. : a perennial herb ( Psoralea onobrychis ) of the central United States