Our online medical glossary of medical terms and definitions includes definitions for terms related to treatment, and general medicine
1. A toy that makes a rattle sound; a rattle.
2. An American grass (Crotalaria sagittalis), the seeds of which, when ripe, rattle in the inflated pod. Any species of Crotalaria, a genus of yellow-flowered herbs, with inflated, many-seeded pods.
Source: Websters Vocabulary