Strong’s Greek
G5440 — phulakterion
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
φυλακτήριον
phulakterion — pronounced foo-lak-tay'-ree-on
neuter of a derivative of 5442; a guard-case, i.e. "phylactery" for wearing slips of Scripture texts:-- phylactery. see GREEK for 5442
1 occurrence in the KJV.
Matthew 23:5
But all their works they do for to be seen of men: they make broad their phylacteries, and enlarge the borders of their garments,