Bean
Bean () is a common name for large plant seeds of several genera of the family Fabaceae (alternately Leguminosae) which are used for human or animal food.
Terminology
The term bean originally referred to the seed of the broad or fava bean, but was later expanded to include members of the New World genus Phaseolus, such as the common bean and the runner bean, and the related genus Vigna. The term is now applied generally to many other related plants such as Old World soybeans, peas, chickpeas (garbanzo beans), vetches, and lupins.
Bean is sometimes used as a synonym of pulse, an edible legume, though the term pulses is more correctly reserved for leguminous crops harvested for their dry grain. The term bean usually excludes crops used mainly for oil extraction (such as soy-beans and pea-nuts), as well as those used exclusively for sowing purposes (such as clover and alfalfa). Leguminous crops harvested green for food, such as snap peas, snow peas, and so on, are not considered beans, and are classified as vegetable crops. According to the United Nations Food and Agriculture Organization the term bean should include only species of Phaseolus; however, a strict consensus definition has proven difficult because in the past, several species such as Vigna angularis (azuki bean), mungo (black gram), radiata (green gram), aconitifolia (moth bean)) were classified as Phaseolus and later reclassified. The use of the term bean to refer to species other than Phaseolus thus remains. In some countries, the term bean can mean a host of different species.
