Source : Webster's Revised Unabridged Dictionary (1913)

Hin \Hin\, n. [Heb. h[=i]n.]
   A Hebrew measure of liquids, containing three quarts, one
   pint, one gill, English measure. --W. H. Ward.

Source : WordNet®

hin
     n : ancient Hebrew unit of liquid measure = 1.5 gallons