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Webster 1913 Edition

Noun.

(Bot.)

An herb of the Mint family (

Sideritis

), supposed to heal sword cuts; also, a species of

Galeopsis

Noun.

A genus of plants called Sideritis, of several species.

ironwort ‎(uncountable)

A herb of several species in the genus Sideritis, formerly believed to heal sword cuts.
Galeopsis ladanum, red hemp-nettle.