noun
: a pumping device consisting of two different-sized pipes, one within or adjacent to the other, compressed air or gas being forced down through the smaller pipe causing the fluid which is to be pumped to rise through the larger
noun
: a pumping device consisting of two different-sized pipes, one within or adjacent to the other, compressed air or gas being forced down through the smaller pipe causing the fluid which is to be pumped to rise through the larger
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012