/ Dictionary / Index I iota: Meaning and Definition of Find definitions for: i•o•ta Pronunciation: (ī-ō'tu), [key] — n. a very small quantity; jot; whit. the ninth letter of the Greek alphabet (I, &igr;). the vowel sound represented by this letter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: iota (Thesaurus) Ioshkar-Ola iotacism Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language