Southpaw is a boxing term that designates the stance where the boxer has his right hand and right foot forward, leading with right jabs, and following with a left cross right hook. Southpaw is the normal stance for a left-handed boxer.
Because the American system of measurement is very similar to the British imperial system, units are also commonly referred to as imperial units. The units have many different origins.
area unit - a system of units used to measure areas. square measure. unit, unit of measurement - any division of quantity accepted as a standard of measurement or exchange; the dollar is the United States unit of currency; a unit of wheat is a bushel; change per unit volume.