CĂPISTRUM (φορβειά), a halter, or tie for horses, asses, or other
animals, placed round the head or neck, and made of osiers or other
fibrous materials. The Greek word φορβειά was also applied to a
contrivance used by pipers and trumpeters to compress their mouths
and cheeks, and thus to aid them in blowing. It is often seen in
works of ancient art, and was said to be the invention of Marsyas.
[TIBIA.]