# Horizontal plane

Horizontal plane
Horizontal Hor`i*zon"tal, a. [Cf. F. horizontal.] 1. Pertaining to, or near, the horizon. ``Horizontal misty air.'' --Milton. [1913 Webster]

2. Parallel to the horizon; on a level; as, a horizontalline or surface. [1913 Webster]

3. Measured or contained in a plane of the horizon; as, horizontal distance. [1913 Webster]

{Horizontal drill}, a drilling machine having a horizontal drill spindle.

{Horizontal engine}, one the piston of which works horizontally.

{Horizontal fire} (Mil.), the fire of ordnance and small arms at point-blank range or at low angles of elevation.

{Horizontal force} (Physics), the horizontal component of the earth's magnetic force.

{Horizontal line} (Descriptive Geometry & Drawing), a constructive line, either drawn or imagined, which passes through the point of sight, and is the chief line in the projection upon which all verticals are fixed, and upon which all vanishing points are found.

{Horizontal parallax}. See under {Parallax}.

{Horizontal plane} (Descriptive Geometry), a plane parallel to the horizon, upon which it is assumed that objects are projected. See {Projection}. It is upon the horizontal plane that the ground plan of the buildings is supposed to be drawn.

{Horizontal projection}, a projection made on a plane parallel to the horizon.

{Horizontal range} (Gunnery), the distance in a horizontal plane to which a gun will throw a projectile.

{Horizontal water wheel}, a water wheel in which the axis is vertical, the buckets or floats revolving in a horizontal plane, as in most turbines. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

### Look at other dictionaries:

• Horizontal plane — In astronomy, geography, geometry and related sciences and contexts, a plane is said to be horizontal at a given point if it is locally perpendicular to the gradient of the gravity field, i.e., with the direction of the gravitational force (per… …   Wikipedia

• horizontal plane — 1. see plana horizontalia. 2. in dentistry, 3. a plane passing through a tooth at right angles to its long axis …   Medical dictionary

• Frankfort horizontal plane — Frank·fort hor·i·zon·tal plane fraŋk fərt .hȯr ə zänt əl , .här n a plane used in craniometry that is determined the highest point on the upper margin of the opening of each external auditory canal and the low point on the lower margin of the… …   Medical dictionary

• Horizontal — Hor i*zon tal, a. [Cf. F. horizontal.] 1. Pertaining to, or near, the horizon. Horizontal misty air. Milton. [1913 Webster] 2. Parallel to the horizon; on a level; as, a horizontalline or surface. [1913 Webster] 3. Measured or contained in a… …   The Collaborative International Dictionary of English

• Horizontal drill — Horizontal Hor i*zon tal, a. [Cf. F. horizontal.] 1. Pertaining to, or near, the horizon. Horizontal misty air. Milton. [1913 Webster] 2. Parallel to the horizon; on a level; as, a horizontalline or surface. [1913 Webster] 3. Measured or… …   The Collaborative International Dictionary of English

• Horizontal engine — Horizontal Hor i*zon tal, a. [Cf. F. horizontal.] 1. Pertaining to, or near, the horizon. Horizontal misty air. Milton. [1913 Webster] 2. Parallel to the horizon; on a level; as, a horizontalline or surface. [1913 Webster] 3. Measured or… …   The Collaborative International Dictionary of English

• Horizontal fire — Horizontal Hor i*zon tal, a. [Cf. F. horizontal.] 1. Pertaining to, or near, the horizon. Horizontal misty air. Milton. [1913 Webster] 2. Parallel to the horizon; on a level; as, a horizontalline or surface. [1913 Webster] 3. Measured or… …   The Collaborative International Dictionary of English

• Horizontal force — Horizontal Hor i*zon tal, a. [Cf. F. horizontal.] 1. Pertaining to, or near, the horizon. Horizontal misty air. Milton. [1913 Webster] 2. Parallel to the horizon; on a level; as, a horizontalline or surface. [1913 Webster] 3. Measured or… …   The Collaborative International Dictionary of English

• Horizontal line — Horizontal Hor i*zon tal, a. [Cf. F. horizontal.] 1. Pertaining to, or near, the horizon. Horizontal misty air. Milton. [1913 Webster] 2. Parallel to the horizon; on a level; as, a horizontalline or surface. [1913 Webster] 3. Measured or… …   The Collaborative International Dictionary of English

• Horizontal parallax — Horizontal Hor i*zon tal, a. [Cf. F. horizontal.] 1. Pertaining to, or near, the horizon. Horizontal misty air. Milton. [1913 Webster] 2. Parallel to the horizon; on a level; as, a horizontalline or surface. [1913 Webster] 3. Measured or… …   The Collaborative International Dictionary of English