noun. One that couples, especially a device for coupling two railroad cars.

noun. A device connecting two organ keyboards so that they may be played together.

noun. In zoology, a plate which joins one of the swimming-appendages of a crustacean to its fellow on the opposite side of the body.

noun. One who or that which couples, joins, or unites.

noun. One who couples; that which couples, as a link, ring, or shackle, to connect cars.

noun. a contrivance by which any two or more of the ranks of keys, or keys and pedals, are connected so as to act together when the organ is played.

noun. Someone who couples things together, especially someone whose job it is to couple railway carriages.

noun. Anything that serves to couple things together; but especially a device that couples railway carriages.

noun. A device that connects two keyboards of an organ together so that they play together.

noun. A device used to convert electronic information into audible sound signals for transmission over telephone lines.

noun. An electrical device used to transfer energy from one electric device to another, especially without a physical connection.

noun. a mechanical device that serves to connect the ends of adjacent objects

"Shortly after the introduction of pneumatic action, an organ with an occasional octave coupler, that is a coupler which depressed a key an octave higher or lower than the one originally struck, was sometimes met with."

automatic coupler  

mechanical device  

clevis  clutch  fluid drive  swivel  turn-buckle  

amplifier  analyzer  attenuator  cabling  connector