a symmetry element of a space group such that a rotation of the lattice about the axis and a translation of the lattice some fraction of the lattice’s unit distance brings the lattice back to its original position.
noun 1. Slang. an eccentric or whimsically eccentric person; a nut. 2. Baseball. a pitched ball that curves toward the side of the plate from which it was thrown. adjective 3. Slang. eccentric or whimsically eccentric: What a screwball idea! noun 1. an odd or eccentric person adjective 2. odd; zany; eccentric screwball 1 screwball […]
noun 1. a tree, Prosopis pubescens, of the legume family, native to the southwestern U.S., bearing twisted pods used as fodder. 2. the pod itself.
noun 1. a cap designed to screw onto the threaded mouth of a bottle, jar, or the like. noun 1. a cap that screws on to a thread around the opening of a jar, bottle, etc to form a seal (as modifier): screw-cap wines
noun 1. a device for moving loose materials, consisting of a shaft with a broad, helically wound blade rotating in a tube or trough. screw conveyor noun 1. (engineering) a duct along which material is conveyed by the rotational action of a spiral vane which lies along the length of the duct Also called worm […]