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smartweed

[smahrt-weed]

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noun

any of several weeds of the genus Polygonum, having a smarting, acrid juice.

Origin of smartweed

First recorded in 1780–90; smart + weed¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for smartweed

Historical Examples of smartweed

It is a near relative of knot grass and smartweed and Prince's feather.
Seed Dispersal
William J. Beal
A good yellow can be obtained by experimenting with smartweed.
Practical Basketry
Anna A. Gill
There are several common "weeds" belonging to this family, such as Dock, Sorrel, and Smartweed.
Field Book of Western Wild Flowers
Margaret Armstrong
The white-throated sparrow, a large and very pretty bird, eats the seeds of smartweed and ragweed.
The Children's Book of Birds
Olive Thorne Miller
Ragweed and smartweed seeds are dainties to him as some nuts are to you, and he eats a great many.
The Children's Book of Birds
Olive Thorne Miller