slippery elm

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noun

an elm, Ulmus rubra, of eastern North America, having a mucilaginous inner bark.
the bark of this elm, used as a demulcent.

Origin of slippery elm

First recorded in 1740–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for slippery elm

slippery elm

noun

a tree, Ulmus fulva, of E North America, having oblong serrated leaves, notched winged fruits, and a mucilaginous inner bark
the bark of this tree, used medicinally as a demulcent
Also called: red elm
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