- noun a tropical plant (Maranta arundinacea) whose tubers yield starch. Used particularly in the preparation of invalid foods, since this form of starch is easily digested.
- masculine A starch powder obtained from the root of a West Indian plant, Maranta arundinacea, used for thickening where a clear, glossy glaze is required.
Origin & History of “arrowroot”
Arrowroot, a tropical American plant with starchy tubers, gets its name by folk etymology, the process whereby an unfamiliar foreign word is reformulated along lines more accessible to the speakers of a language. In this case the word in question was aru-aru, the term used by the Arawak Indians of south America for the plant (meaning literally ‘meal of meals’). English-speakers adapted this to arrowroot because the root of the plant was used by the Indians to heal wounds caused by poisoned arrows.