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Pertaining to, or near, the horizon. "Horizontal misty air." Milton.

The state or quality of being horizontal. Kirwan.

In a horizontal direction or position; on a level; as, moving horizontally.

Having a level horizontal surface or position. Lee.

Without inclination or dipping; -- said the magnetic needle balances itself horizontally, having no dip. The aclinic line is also termed the magnetic equator. Prof. August.

An entrance or passage. Specifically: The nearly horizontal opening by which a mine is entered, or by which water and ores are carried away; -- called also drift and tunnel.

The horizontal line which measures the distance to which a projectile is thrown; the range.

The degree of elevation of an object, or the angle it makes with a horizontal line; inclination; rising grade; as, a road has an ascent of five degrees.

e of the eye of the volute. -- Neutral axis (Mech.), the line of demarcation between the horizontal elastic forces of tension and compression, exerted by the fibers in any cross section of a girder. -- Optic axis of a crystal, the direction in which a ray of transmitted light suffers no double refraction. All crystal…

Of or pertaining to the azimuth; in a horizontal circle. Azimuthal error of a transit instrument, its deviation in azimuth from the plane of the meridian.

A blue color, represented in engraving by horizontal parallel lines.

The upper part of a lode, or the roof of a horizontal underground passage.

Barren regions, especially in the western United States, where horizontal strata (Tertiary deposits) have been often eroded into fantastic forms, and much intersected by canons, and where lack of wood, water, and forage increases the difficulty of traversing the country, whence the name, first given by the Canadian Fre…

reaction wheel. The water flows into a vertical tube and gushes from apertures in hollow horizontal arms, causing the machine to revolve on its axis.

Horizontally.

eavage. See under Cleavage. -- Basal plane (Crystallog.), one parallel to the lateral or horizontal axis.

Arch.), a window or one division of a window having vertical sides, but with the sill not horizontal, as where it follows the rake of a staircase.

A blacksmith's hammer, suspended, and worked horizontally.

One of the principal horizontal timbers of a building or ship. The beams of a vessel are strong pieces of timber stretching across from side to side to support the decks. Totten.

A layer or seam, or a horizontal stratum between layers; as, a bed of coal, iron, etc.