melilot
noun
mel·i·lot ˈme-lə-ˌlät 
: sweet clover
especially : a yellow-flowered sweet clover (Melilotus officinalis)
Word History
Etymology
Middle English mellilot, from Old French melilot, from Latin melilotos, from Greek melilōtos, from meli honey + lōtos clover, lotus — more at mellifluous
First Known Use
14th century, in the meaning defined above