n. One of the Plymouth Brethren, or of a sect among them; -- so called from John N. Darby, one of the leaders of the Brethren. [ 1913 Webster ]
n. One who holds the principles of Puseyism; -- often used opprobriously. [ 1913 Webster ]
n. [ So called after J.D. Whitney, an American geologist. ] (Min.) an arsenide of copper from Lake Superior. [ 1913 Webster ]
n. (Zool.) The European yellow-hammer. [ 1913 Webster ]
n. (Min.) A fluosilicate of alumina occurring in tetrahedral crystals at the Zuñi mine in Colorado. [ 1913 Webster ]