τετράδιον (tetrádiontet-rad'-ee-onnounsquad)
[Grk] τετράδιον LN: 55.11 GK: G5482
Derivation: neuter of a presumed derivative of τέτρας (a tetrad;
Strong's: from τέσσαρες); a quaternion or squad (picket) of four Roman soldiers
KJV: --quaternion.
See: τέσσαρες