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Meaning of butterweed

but•ter•weed

Pronunciation: (but'ur-wēd"), [key]
— n.
  1. any wild plant having conspicuously yellow flowers or leaves.
  2. the horseweed.
  3. a ragwort (Senecio jacobaea) or groundsel (S. vulgaris), both having yellow ray flowers.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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