/ Dictionary / Index G groundsel: Meaning and Definition of Find definitions for: ground•sel Pronunciation: (ground'sul), [key] — n. any composite plant of the genus Senecio, esp. S. vulgaris, a common weed having clusters of small yellow disk flowers without rays. ground•sel Pronunciation: (ground'sul), [key] — n. groundsill. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: groundsel (Thesaurus) ground rule double groundsel tree Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language