Noah Webster's Dictionary 1. (n.) A very small amount; also the ninth letter of the Greek alphabet corresponding with the English i. 2. (n.) A very small quantity or degree; a jot; a particle.

Multi-Version Concordance Iota (1 Occurrence) Matthew 5:18 Solemnly I tell you that until Heaven and earth pass away, not one iota or smallest detail will pass away from the Law until all has taken place. (WEY DBY YLT RSV)