Bean (pron.: /ˈbiːn/) is a common name for large plant seeds used for human food or animal feed of several genera of the family Fabaceae (alternately Leguminosae).
A legume /ˈlɛɡʲuːm/ is a plant in the family Fabaceae (or Leguminosae), or the fruit or seed of such a plant. Legumes are grown agriculturally, primarily for their food grain seed (e.g. beans and lentils, or generally pulse), for livestock forage and silage, and as soil-enhancing green manure. Legumes are notable in that most of them have symbiotic nitrogen-fixing bacteria in structures called root nodules. Well-known legumes include alfalfa, clover, peas, beans, lentils, lupins, mesquite, carob, soybeans, peanuts and the woody climbing vine wisteria. Legume trees like the Locust trees (Gleditsia, Robinia) or the Kentucky coffeetree (Gymnocladus dioicus) can be used in permaculture food forests.