society > occupation and work > worker > workers according to type of work > manual or industrial worker > miner > [noun] > coal-miner > working in specific part (3)
a person who works at the pithead, spec. one responsible for the unloading of the cages and the weighing of the coal.
Coal Mining. A miner who works at the buttock (buttock, n. 7). Now historical.
a collier who works at the pit bottom; spec. an onsetter.