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Meaning of mother-of-thyme

moth•er-of-thyme

Pronunciation: (mu'ur-uv-tīm'), [key]
— pl. -thymes.
  1. a branched, woody, prostrate plant, Thymus serpyllum, of the mint family, native to Eurasia and northern Africa, having wiry stems that root at the joints and small, purplish flowers.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.