n. [ Sp., from Ar. nā'ūra. ] A large water wheel, turned by the action of a stream against its floats, and carrying at its circumference buckets, by which water is raised and discharged into a trough; used in Arabia, China, and elsewhere for irrigating land; a Persian wheel. [ 1913 Webster ]
a. [ From norite. ] (Geol.) Pertaining to the upper portion of the Laurentian rocks. T. S. Hunt. [ 1913 Webster ]