1. horizontal - Noun
2. horizontal - Adjective
Pertaining to, or near, the horizon.
Parallel to the horizon; on a level; as, a horizontalline or surface.
Measured or contained in a plane of the horizon; as, horizontal distance.
Source: Webster's dictionarya horizontal surface Source: Internet
;1000 ft rule :An aircraft must maintain an altitude of 1,000 feet above the highest obstacle within a horizontal radius of 2,000 feet of the aircraft over any congested area of a city, town, or settlement, or over any open air assembly of persons. Source: Internet
352x240 (or SIF ) resolution was chosen because it is half the vertical and half the horizontal resolution of NTSC video. 352x288 is similarly one quarter PAL/SECAM resolution. Source: Internet
4. Berm : Nearly horizontal portion that stays dry except during extremely high tides and storms. Source: Internet
A300B10 (A310) main Introduced a shorter fuselage, a new, higher aspect ratio wing, smaller horizontal tail and two crew operation. Source: Internet
A basic IR spectrum is essentially a graph of infrared light absorbance (or transmittance ) on the vertical axis vs. frequency or wavelength on the horizontal axis. Source: Internet