plural of coupling-box

The box or ring of metal connecting the contiguous ends of two lengths of shafts.

A device for uncoupling machinery in the event of a sudden stoppage.

plural of ratchet coupling

plural of coupling rod

(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.

Alternative form of couple three

(colloquial, US) Two or three or a similarly small number of.

plural of couplant

A small town in Perth and Kinross council area, Scotland (OS grid ref NO2240).