Level Range, of a piece of ordnance, is the line it describes, when directed parallel to the horizon or horizontal line. See Gunnery, passim.

Horizontal Moon. See Moon, Astronomy Index.

Horizontal Speculum. See Speculum.

Horminum, Clary, a genus of plants belonging to the didynamia class; and in the natural method ranking under the 52d order, Verticillatae. See Botany Index.