pit pony 
noun British historical
A pony that hauled loads in a coal mine.A young man learns the value of honesty as he befriends a mine pit pony....
- Though small of stature, Harvey was built like a pit pony and had the rough-hewn features of a Klondiker.
- When they closed that mine in 1990 the pit ponies were released into a green field on a neighbouring farm.
- quadripartite
- quadripartite distinction
- quadripartite division
- quadripartite vault
- quadripartite vaulting
- quadripartition
- quadripinnate
- quadriplanar
- quadriplane
- quadriplegia
- quadriplegic
- quadriplex
- quadriplicate
- quadriplicated
- quadripolar
- quadripole
- quadriporticus
- quadriradiate
- quadrireme
- quadrisect
- quadrisection
- quadriseptate
- quadriserial
- quadrisetose
- quadrisonic