from The Century Dictionary.

  • noun An instrument, or a system of mechanism, which carries, moves, or regulates the motion of a rule in a machine.


Sorry, no etymologies found.


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  • Vail, in the practice of the first line, grew accustomed to sending messages by dipping the end of the wire in the mercury cup, -- the beginning of the present transmitting instrument, which is also his invention -- and Morse's "port-rule," types, and other complicated arrangements, went into the scrap-heap.

    Steam, Steel and Electricity

  • a series of types carried on a port-rule or composing-stick, which travelled at a uniform speed.

    Heroes of the Telegraph


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