jumbo
n.— «The Red Lake gold mine covers 55,000 acres of western Ontario, amid mountains, creeks, and pine forests populated by wild caribou. In its main shaft, which plunges 1,023m into the earth, drilling machines called jumbos extract gold ore, along with massive quantities of muck and rock, which is hauled away by “scoop-trams” and 16-tonne trucks.» —“The wiki way” by Oliver Burkeman in Ontario, Canada Guardian Sept. 5, 2007. (source: Double-Tongued Dictionary)