astragalus

(as-trag’al-us) (L.; Gr. ἀστράγαλος die]. 1. A bone of the foot which articulates the tibia and fibula above with the calcaneum below. 2. A genus of leguminous plants of many species. A. gum’mifer and other Oriental species afford tragacanth: others are poisonous. A. moll is’sim us, of the United States (one of the plants called loco), is poisonous, and its active principle is mydriatic.