Green'stōne, n.
n. [So called from a tinge of green in the color.] (Geol.) A rock, sometimes called trap, consisting of hornblende and feldspar in the state of grains or small crystals.
n. [So called from a tinge of green in the color.] (Geol.) A rock, sometimes called trap, consisting of hornblende and feldspar in the state of grains or small crystals.