Invented in
England in
1780, the
circular saw is a
metal disc (or
blade[?]) with
saw teeth on the edge as well as the
machine that causes the disk to spin. It is a
tool for cutting
wood or other materials and may be
hand-held or
table[?]-mounted. Today they are usually powered by electricity, but large ones in "
saw mills[?]" (where whole
trees are sawed into
lumber) were traditionally powered by
water turning a large
paddlewheel[?].
