alumroot

[ al-uh m-root, -roo t ]
/ ˈæl əmˌrut, -ˌrʊt /

noun

any of several North American plants belonging to the genus Heuchera, of the saxifrage family, especially H. americana, having mottled foliage and greenish-white flowers.
the root of any of these plants, used as an astringent.

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Origin of alumroot

An Americanism dating back to 1805–15; alum1 + root1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for alumroot

alumroot
/ (ˈæləmˌruːt) /

noun

any of several North American plants of the saxifragaceous genus Heuchera, having small white, reddish, or green bell-shaped flowers and astringent roots
the root of such a plant
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