Noun
Any long, slender green bean.
A common bean (Phaseolus vulgaris)
An immature runner bean (Phaseolus coccineus)
A yardlong bean (Vigna unguiculata subsp. sesquipedalis)
A hyacinth bean (Lablab purpureus)
(figuratively) A tall and thin person.
Source: en.wiktionary.org