con·gi·us /ˈkɑnʤɪəs/ 名詞
  Con·gi·us n.
  1. Roman Antiq. A liquid measure containing about three quarts.
  2. Med. A gallon, or four quarts. [Often abbreviated to cong.]
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  congius
       n : a British imperial capacity measure (liquid or dry) equal to
           4 quarts or 4.545 liters [syn: gallon, Imperial gallon]
       [also: congii (pl)]