Machine

—This word is most commonly applied to such pieces of mechanism as are used in the industrial arts for mechanically shaping, dre ing, and combining materials for various purposes; machines are frequently named from their use, as, screw cutting machines, or from the thing made or acted upon; as, machine ruler; compound machines are formed from two or more simple machines. Tools are the simplest implements of art; these when they become complicated in their structure become machines, and machines when they act with great power are usually termed engines.