Congiary

Con"gi*a*ry (?), n.; pl. Congiaries (#). [L. congiarium, fr. congius a liquid measure.] A present, as of corn, wine, or oil,
made by a Roman emperor to the soldiers or the people; -- so called because measured to each in a congius. Addison.
&hand; In later years, when gifts of money were distributed, the name congius was retained.

Congius

Con"gi*us (?), n. [L.]

1. (Roman Antiq.) A liquid measure containing about three quarts.

2. (Med.) A gallon, or four quarts. [Often abbreviated to cong.]