Rat"tle*box` (-bŏks`), n.
1. A toy that makes a rattling sound; a
rattle.
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.