κεραία keraía

Meaning

something horn-like, i.e. (specially) the apex of a Hebrew letter (figuratively, the least particle)

In the King James Version: tittle

Derivation: feminine of a presumed derivative of the base of G2768 (κέρας);

Where it is used

• Matthew 5:18 For I tell you truly, until heaven and earth pass away, not a single jot, not a stroke of a pen, will disappear from the Law until everything is accomplished.
• Luke 16:17 But it is easier for heaven and earth to pass away than for a single stroke of a pen to drop out of the Law.