a person or thing that couples
or links together.
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.
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.
a device for transferring electrical energy from one circuit to another, as a transformer
that joins parts of a radio apparatus together by induction.
(in color photography) a chemical that reacts with the developer to produce one of the colors in a print or transparency.