n. 1. (Min.) A local name for the igneous rocks of Derbyshire, England; -- said by some to be derived from the German todter stein, meaning dead stone, that is, stone which contains no ores. [ 1913 Webster ]
2. Bufonite, formerly regarded as a precious stone, and worn as a jewel. See Bufonite. [ 1913 Webster ]
n. (Bot.) A name given to many umbrella-shaped fungi, mostly of the genus Agaricus. The species are almost numberless. They grow on decaying organic matter. [ 1913 Webster ]