arrowroot

n. 1. (Bot.) A white-flowered west Indian plant of the genus Maranta, esp. Maranta arundinacea, now cultivated in many hot countries. Its root yields arrowroot starch. It said that the Indians used the roots to neutralize the venom in wounds made by poisoned arrows.
Syn. -- arrowroot, American arrowroot, obedience plant. [ 1913 Webster ]

2. A nutritive starch obtained from the rootstocks of Maranta arundinacea, and used as food, esp. for children an invalids; also, a similar starch obtained from other plants, as various species of Maranta and Curcuma. [ 1913 Webster ]