·noun An iota; a point; a tittle; the smallest particle. ·cf. Bit, ·noun.
II. Jot ·vt To set down; to make a brief note of;
— usually followed by down.
Or Iota, the smallest letter of the Greek alphabet, used metaphorically or proverbially for the smal...
Easton's Bible Dictionary
the English form of the Greek iota, i.e., the smallest letter of the Greek alphabet. The Hebrew is y...
William Smith's Bible Dictionary