pillion

noun

A pad or cushion for an extra rider behind the saddle on a horse or motorcycle.

A bicycle or motorcycle saddle.

A saddle, especially a light and simple saddle without a raised bow and pommel.

A pad or cushion fitted for adjustment to a saddle behind as a seat for a second person, usually a woman.

In mining, tin recovered from the slags in the smelting of that metal. This is done by repeated stamping, sifting, and washing.