RATTLEBOX

Rat″tle‐box′ (–bŏks′), n. 1. 1. A toy that makes a rattling sound; a rattle.
2. 2. (Bot.) (a) An American herb (Crotalaria sagittalis), the seeds of which, when ripe, rattle in the inflated pod. (b) Any species of Crotalaria, a genus of yellow-flowered herbs, with inflated, many-seeded pods.