• Webster's Revised Unabridged Dictionary
    • n Saw-wort (Bot) Any plant of the composite genus Serratula; -- so named from the serrated leaves of most of the species.
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Century Dictionary and Cyclopedia
    • n saw-wort A plant of the Old World genus Serratula, especially S. tinctoria, whose foliage yields a yellow dye. The name is derived from the sharp serration of the leaves. Species of Saussurea are also so called.
    • n saw-wort The button-snakeroot, Laciniaria spicata.
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In literature:

Serratula tinctoria (Saw-wort) .
"Handbook to the Severn Valley Railway Illustrative and Descriptive of Places along the Line from Worcester to Shrewsbury" by J. Randall