miters hell (mitershel)

The turreted shell of a mollusk of the genus Mitra or family Mi trida; a tiara-shell. See cut under Mitra. miter-sill (mi'ter-sil), n. A raised step against which the foot of a canal-lock gate shuts on the floor of a lock-bay. E. H. Knight. miter-square (mi'tėr-skwar), n. In carp., an immovable bevel for striking upon a piece of stuff an angle of 45°. miter-valve (mi'tėr-valv), n. A valve of which the lid or plug is the frustum of a cone, the face of the seat being inclined at an angle of 45° to the axis of the valve. miter-wheel (mi'ter-hwēl), n. particular kind of bevel-wheel, the bevel being limited to an angle of 45°, and the teeth of the wheel meshing with the teeth of another of the same bevel and diameter. The shafts of the wheels are at right angles with each other; and rotary motion in any plane is, by this mechanism, translated, without change of velocity, into motion in another plane at right angles with the first. Miter-wheels are much used in millwork. See bevel - wheel and bevel - gear. 2. In gla -cutting, a wheel used for cutting a groove of triangular section. Miter-wheels.