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Exactly upright or vertical; pointing to the zenith; at right angles to the plane of the horizon; extending in a right line from any point toward the center of the earth.

umb piano. See Digitorium. -- Grand piano. See under Grand. -- Square piano, one with a horizontal frame and an oblong case. -- Upright piano, one with an upright frame and vertical wires.

stone laid upon a bank to prevent wear by tides or currents. Pitching piece (Carp.), the horizontal timber supporting the floor of a platform of a stairway, and against which the stringpieces of the sloping parts are supported.

chart; especially, a top view, as of a machine, or the representation or delineation of a horizontal section of anything, as of a building; a graphic representation; a diagram.

the jack plane; the smoothing plane; the molding plane, etc. Objective plane (Surv.), the horizontal plane upon which the object which is to be delineated, or whose place is to be determined, is supposed to stand. -- Perspective plane. See Perspective. -- Plane at infinity (Geom.), a plane in which points infinitely…

The course of plank laid horizontally over the timberheads of a vessel's frame.

A horizontal timber laid upon a wall, or upon corbels projecting from a wall, and supporting the ends of other timbers; also used specifically of the roof plate which supports the ends of the roof trusses or, in simple work, the feet of the rafters.

Any flat or horizontal surface; especially, one that is raised above some particular level, as a framework of timber or boards horizontally joined so as to form a roof, or a raised floor, or portion of a floor; a landing; a dais; a stage, for speakers, performers, or workmen; a standing place.

With all small arms, the second point in which the natural line of sight, when horizontal, cuts the trajectory.

s (Opt.), the point where the principal axis meets the surface. -- Pole plate (Arch.), a horizontal timber resting on the tiebeams of a roof and receiving the ends of the rafters. It differs from the plate in not resting on the wall.

cupine wood (Bot.), the hard outer wood of the cocoa palm; -- so called because, when cut horizontally, the markings of the wood resemble the quills of a porcupine.

Extended horizontally; stretched out.

salem, mentioned in Matt. xxvii. 7. -- Potter's ore. See Alquifou. -- Potter's wheel, a horizontal revolving disk on which the clay is molded into form with the hands or tools. "My thoughts are whirled like a potter's wheel." Shak. Potter wasp (Zoöl.), a small solitary wasp (Eumenes fraternal) which constructs a glob…

tical (Astron.), the vertical circle which passes through the east and west points of the horizon. -- Prime-vertical dial, a dial in which the shadow is projected on the plane of the prime vertical. -- Prime-vertical transit instrument, a transit instrument the telescope of which revolves in the plane of the prime ve…

In root construction, a horizontal member supported on the principals and supporting the common rafters.

scopic sights, and usually having a plumb line or spirit level for fixing the vertical or horizontal direction. Gunner's quadrant, an instrument consisting of a graduated limb, with a plumb line or spirit level, and an arm by which it is applied to a cannon or mortar in adjusting it to the elevation required for attain…

To adjust (a gun) on its carriage; also, to train (a gun) for horizontal firing.

The metal mercury; -- so called from its resemblance to liquid silver. Quicksilver horizon, a mercurial artificial horizon. See under Horizon. -- Quicksilver water, a solution of mercury nitrate used in artificial silvering; quick water.

A bar of timber or metal, usually horizontal or nearly so, extending from one post or support to another, as in fences, balustrades, staircases, etc.

hin limits; to be capable of projecting, or to admit of being projected, especially as to horizontal distance; as, the temperature ranged through seventy degrees Fahrenheit; the gun ranges three miles; the shot ranged four miles.