/ Dictionary / Index T thimbleweed: Meaning and Definition of Find definitions for: thim•ble•weed Pronunciation: (thim'bul-wēd"), [key] — n. any of several plants having a thimble-shaped fruiting head, esp. either of two white-flowered North American plants, Anemone riparia or A. virginiana. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thimbleweed (Thesaurus) thimblerig thimerosal Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language