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coupler - 3 dictionary results

cou⋅pler

[kuhp-ler]
–noun
1. a person or thing that couples or links together.
2. Machinery. a rod or link transmitting force and motion between a rotating part and a rotating or oscillating part.
3. Also called coupling. Railroads. a device for joining pieces of rolling stock.
4. a device in an organ or harpsichord for connecting keys, manuals, or a manual and pedals, so that they are played together when one is played.
5. Electricity. a device for transferring electrical energy from one circuit to another, as a transformer that joins parts of a radio apparatus together by induction.
6. (in color photography) a chemical that reacts with the developer to produce one of the colors in a print or transparency.

Origin:
1545–55; couple + -er 1
cou·pler   (kŭp'lər)   
n.  
  1. One that couples, especially a device for coupling two railroad cars.
  2. A device connecting two organ keyboards so that they may be played together.

Coupler

Coup"ler\ (k?p"l?r), n. One who couples; that which couples, as a link, ring, or shackle, to connect cars.

Coupler of an organ, 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.
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