n. [ L. aconitum, Gr. &unr_;: cf. F. aconit. ] 1. (Bot.) The herb wolfsbane, or monkshood; -- applied to any plant of the genus Aconitum (tribe Hellebore), all the species of which are poisonous. [ 1913 Webster ]

2. An extract or tincture obtained from Aconitum napellus, used as a poison and medicinally. [ 1913 Webster ]

Winter aconite, a plant (Eranthis hyemalis) allied to the aconites. [ 1913 Webster ]

n. [ See Anthracite. ] (Min.) A coal-black marble, usually emitting a fetid smell when rubbed; -- called also stinkstone and swinestone. [ 1913 Webster ]

n. [ Gr. &unr_; dust: cf. F. conite. So called on account of its gray color. ] (Min.) A magnesian variety of dolomite. [ 1913 Webster ]

n. [ Cf. F. glauconite, glauconie, fr. L. glaucus. See Glaucous. ] (Min.) The green mineral characteristic of the greensand of the chalk and other formations. It is a hydrous silicate of iron and potash. See Greensand. [ 1913 Webster ]

n. [ Gr. leiro`s pale + koni`a powder. ] (Min.) A hydrated arseniate of copper, occurring in obtuse pyramidal crystals of a sky-blue or verdigris-green color. [ 1913 Webster ]

n. [ Gr. me`las black + &unr_; dust. ] (Min.) An earthy black oxide of copper, arising from the decomposition of other ores. [ 1913 Webster ]

n. [ Oto- + Gr. &unr_; dust. ] (Anat.) (a) A mass of otoliths. (b) An otolith. [ 1913 Webster ]

n. (Min.) A native oxide of antimony occurring in masses of a yellow color. [ 1913 Webster ]