Webster's Revised Unabridged Dictionary · 1913

Jot

Jot , noun

[Latin iota, Greek 'iw^ta the name of the letter ι (English i, Hebrew yōd), the smallest letter of the Greek alphabet. Compare Iota.]

An iota; a point; a tittle; the smallest particle. Compare Bit, n.
Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled. — Matt. v. 18
Neither will they bate One jot of ceremony. — Shakespeare

Jot , transitive verb

To set down; to make a brief note of; -- usually followed by down.