hydraulic mining


noun

placer mining using a pressurized stream of water.
Also called hy·drau·lick·ing [hahy-draw-li-king, -drol-i-king] /haɪˈdrɔ lɪ kɪŋ, -ˈdrɒl ɪ kɪŋ/.

Origin of hydraulic mining

An Americanism dating back to 1855–60