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The Collaborative International Dictionary
Plug rod

Plug \Plug\, n. [Akin to D. plug, G. pflock, Dan. pl["o]k, plug, Sw. plugg; cf. W. ploc.]

  1. Any piece of wood, metal, or other substance used to stop or fill a hole; a stopple.

  2. A flat oblong cake of pressed tobacco. [U. S.]

  3. A high, tapering silk hat. [Slang, U.S.]

  4. A worthless horse. [Slang, U.S.]

  5. (Building) A block of wood let into a wall, to afford a hold for nails.

    Breech plug (Gun.), in breech-loading guns, the metal plug or cylinder which closes the aperture in the breech, through which the gun is loaded.

    Fire plug, a street hydrant to which hose may be attached.

    Hawse plug (Naut.), a plug to stop a hawse hole.

    Plug and feather. (Stone Working) See Feather, n., 7.

    Plug centerbit, a centerbit ending in a small cylinder instead of a point, so as to follow and enlarge a hole previously made, or to form a counterbore around it.

    Plug rod (Steam Eng.), a rod attached to the beam for working the valves, as in the Cornish engine.

    Plug valve (Mech.), a tapering valve, which turns in a case like the plug of a faucet.

Wiktionary
plug rod

n. A rod attached to the beam for working the valves, as in the Cornish engine.

Usage examples of "plug rod".

Casting a heavy plug rod required a sensitive thumb, but invariably Garcia would release the spool too early or too late.