- tree (Legminosae), a medium to large tree of the genus that yields the commercial timber known by the trade name Petai. It has spreading buttresses, bipinnate leaves with small leaflets, and long stalked flowers that produce leathery pods. The rather large seeds are sold in the larger markets. They are chewed to relieve gas pains. The seeds are also one of the ingredients of the boreh called singrong jangkep. In other parts of Asia the seeds are used for intestinal disorders and the powdered bark is used for skin problems.