/ Dictionary / Index T theridiid: Meaning and Definition of Find definitions for: the•rid•i•id Pronunciation: (thu-rid'ē-id, ther"i-dī'id), [key] — n. a spider of the family Theridiidae, comprising the comb-footed spiders. —adj. belonging or pertaining to the family Theridiidae. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: theridiid (Thesaurus) theriatrics theriogenology Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language