- a group of four soldiers
- a quaternion, a group of four soldiers.
1) a quaternionA guard consisting of four soldiers (for among the Romans this was the usual number of the guard to which the custody of captives and prisoners was intrusted; two soldiers were confined with the prisoner and two kept guard outside). Four quaternions of soldiers would be used to guard one all night, one for each of the four night watches.
Neuter of a presumed derivative of τέτρας tetras (a tetrad; from G5064); a quaternion or squad (picket) of four Roman soldiers
KJV Usage: quaternion.