nLablablăb"lăb(Bot) an East Indian name for several twining leguminous plants related to the bean, but commonly applied to the hyacinth bean (Dolichos Lablab).
Century Dictionary and Cyclopedia
nlablabThe Egyptian or black bean, Dolichos Lablab, a native of India, widely cultivated, and naturalized in most warm countries. The species as named includes several varieties, formerly treated as species of a genus Lablab. as L. vulgaris and L. cultratus; also L. perennans, the white China lablab, and D. or L. lignosus, the horse-eye bean.
It is a day of feasting, and, in addition to rice, Dolichos Lablab is cooked.
"Omens and Superstitions of Southern India" by Edgar Thurston