noun
: a system for storing fuel oil or gasoline in tanks having the lower part filled with water upon which the lighter oil rests, water being pumped in from below to maintain the pressure as oil is withdrawn
noun
: a system for storing fuel oil or gasoline in tanks having the lower part filled with water upon which the lighter oil rests, water being pumped in from below to maintain the pressure as oil is withdrawn
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012