wallwort

noun

: any of several plants that grow on or in walls: such as

a

: danewort

b

: wall pellitory

c

: a stonecrop (Sedum acre)

d

: wall rue

Word History

Etymology

alteration (influenced by wall entry 1) of earlier walwort danewort, from Middle English walwort, walwurt, from Old English wealhwyrt, literally, foreign herb, from Wealh Welshman, foreigner + wyrt herb, root; probably from the belief that it grew where Welsh blood was spilled

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