jot

Etymology

From Latin iōta, from Ancient Greek ἰῶτα (iôta). Doublet of iota.

noun

1. Iota; the smallest letter or stroke of any writing.
   Of old, men said, “Sin not; By every line and jot Ye shall abide; man’s heart is false and vile.” 1904, Bliss Carman, “Christmas Eve at St. Kavin’s”, in Pipes of Pan: Songs from a Northern Garden, Boston: L.C. Page, page 107
2. A small amount, bit; the smallest amount.
   He didn't care a jot for his work.
   What does that matter? Arsenic would put poor Emily out of the way just as well as strychnine. If I’m convinced he did it, it doesn’t matter a jot to me how he did it. 1920, Agatha Christie, chapter 8, in The Mysterious Affair at Styles
3. A brief and hurriedly written note.
   I say, it is no uneven jot, to pass from the more faint and obscure examples of Spermatical life to the more considerable effects of general Motion in Minerals, Metalls, and sundry Meteors […] 1662, Henry More, An Antidote Against Atheism, Book II, A Collection of Several Philosophical Writings of Dr. Henry More, p. 53
   Yes, it is beautiful. I have marked it long, Long in my dusty head its jot secreted, Yet my heart never knew this word a song Till in the night softly by you repeated. 1920, Robert Nichols, “Sonnets to Aurelia, IV” in Aurelia and Other Poems, London: Chatto & Windus, p. 29, “Lover,” you say; “how beautiful that is, That little word!” […]
4. (obsolete) A moment, an instant.
   1728, Lewis Theobald, Double Falshood: or, the Distrest Lovers, London: J. Watts, Act I, Scene 1, p. 12, Making my Death familiar to my Tongue Digs not my Grave one Jot before the Date.

verb

1. (usually with "down") To write quickly.
   Tell me your order, so I can jot it down.