CORE n.
The bony process which forms the central axis of the horns in many animals. Core box (Founding), a box or mold, usually divisible, in which cores are molded. -- Core print (Founding), a projecting piece on a pattern which forms, in the mold, an impression for holding in place or steadying a core.
COUPLING n.
which connects the cars in a train; a shaft coupling, which connects the ends of shafts. Box coupling, Chain coupling. See under Box, Chain. -- Coupling box, a coupling shaped like a journal box, for clamping together the ends of two shafts, so that they may revolve together. -- Coupling pin, a pin or bolt used in c…