• WordNet 3.6
    • n thoroughwort perennial herb of southeastern United States having white-rayed flower heads; formerly used as in folk medicine
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Webster's Revised Unabridged Dictionary
    • n Thoroughwort Same as Boneset.
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Century Dictionary and Cyclopedia
    • n thoroughwort A composite plant, Eupatorium perfoliatum, common in eastern North America. It has a stout hairy stem, 2 to 4 feet high, with opposite leaves united at the base (connate-perfoliate), the stem thus passing through the blade (whence the name). The flowers are white, many in a head, the heads in a large compound corymb. The leaves and tops form an officinal as well as domestic drug of tonic and diaphoretic properties, in large doses emetic and aperient. The name is extended to other species of the genus. Also boneset and Indian sage.
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In literature:

Thoroughwort is excellent for dyspepsy, and every disorder occasioned by indigestion.
"The American Frugal Housewife" by Lydia M. Child
She brewed a great bowl of thoroughwort tea and carried it up to Mehitable.
"Young Lucretia and Other Stories" by Mary E. Wilkins
I think I never did it but three times; and the third time it was thoroughwort and molasses!
"Aunt Madge's Story" by Sophie May
Suffice it to say, that it is done here every day, and often through the aid of a little thoroughwort tea, or other harmless agent.
"The American Reformed Cattle Doctor" by George Dadd

In poetry:

Did some lodge here
And leave for a keepsake
Wisteria trousers? Thoroughworts,
Impossible to forget,
Their fragrance lingers on.
"Did some lodge here" by Ki no Tsurayuki