noun
: a rotary pump consisting of two meshing gear wheels in a suitable casing whose contrarotation entrains the fluid on one side and discharges it on the other
noun
: a rotary pump consisting of two meshing gear wheels in a suitable casing whose contrarotation entrains the fluid on one side and discharges it on the other
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012