arrowroot

[ ar-oh-root, -roo t ]
/ ˈær oʊˌrut, -ˌrʊt /

noun

a tropical American plant, Maranta arundinacea, the rhizomes of which yield a nutritious starch.
the starch itself.
any of several other plants yielding a similar starch.
the starch of these plants, used in cooking as a binder or thickener.

Origin of arrowroot

First recorded in 1690–1700; so called from use of its root in treatment of wounds made by poisoned arrows
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for arrowroot

arrowroot

/ (ˈærəʊˌruːt) /

noun

a white-flowered West Indian plant, Maranta arundinacea, whose rhizomes yield an easily digestible starch: family Marantaceae
the starch obtained from this plant
any of several other plants whose rhizomes or roots yield starch
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012