Lexical Definition

‎ἰῶτα‎ iōta (ee-o'-tah) iota ^G:N-N
of Hebrew origin (the tenth letter of the Hebrew alphabet)

jot.

• "iota", the name of the eighth letter of the Greek alphabet, put (figuratively) for a very small part of anything

Abbott-Smith

ἰῶτα, τό,
iota (Heb. י, i.e. the smallest letter): Mt 5:18.†

Abbott-Smith References

Liddell-Scott-Jones

ἰῶτα [ῐ], τό,

indeclinable, (Hebrew yôd) the letter ι, [Refs 5th c.BC+]

__2 line, stroke, on a sundial, [Refs 3rd c.BC+]
__3 proverbial, of anything very small, smallest letter, jot, [NT]

_{LSJ Scripture Refs: Matt.5.18}