The yoke
A trace.
For horse isle it's Trace. In general too.
A part of the harness which goes over the horse's neck.
The crupper.
The part of the tack (harness) that fits in the mouth of a horse is the bit.
the terret
It is called the crupper.
A part of a harness that keeps the horse from throwing back its head. A part of the rigging on the bowsprit of a sailing ship. Doubling your bet after each losing hand. A half-belt on the back of a garment.
The ligament
coccyx
it is the part that attaches the flower to the plant
envelop
PENIS!