A connecting piece between the front and back axles of a wagon or trailer, often equipped with pins for extending or shortening the bed.

plural of direct coupling

plural of capacitive coupling

(organic chemistry) A crosscoupling reaction used in organic synthesis to form carbon–carbon bonds. It employs a palladium catalyst as well as copper co-catalyst to form a carbon–carbon bond between a terminal alkyne and an aryl or vinyl halide.

plural of Sonogashira coupling

(rail transport) A rod that couples the driving wheels of a locomotive, a steam locomotive in particular, so that the driving wheels act together as a unit.

plural of coupling rod

(computing) a form of coupling in which multiple modules share the same global data

plural of control coupling

(computing) A form of coupling where one module controls the flow of another by passing information on what to do.