Definition of flame nettle
: a coleus (especially Plectranthus scutellarioides synonym Coleus blumei) grown as an ornamental for its bright-colored foliage Coleus, or flame nettle, comes in a rambunctious collection of colorations in its shaggy heart-shaped leaves. — Diane Heilenman, Courier-Journal (Louisville, Kentucky), 30 May 2002
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First Known Use of flame nettle
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