Perpendicular
Perpendicular , adjective
[Latin perpendicularis, perpendicularius: compare French perpendiculaire. See Perpendicle, Pension.]
1.
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.
2.
(Geometry) At right angles to a given line or surface; as, the line ad is perpendicular to the line bc.
Collocations (1)
Perpendicular style (Architecture) , a name given to the latest variety of English Gothic architecture, which prevailed from the close of the 14th century to the early part of the 16th; -- probably so called from the vertical style of its window mullions.
Perpendicular , noun
1.
A line at right angles to the plane of the horizon; a vertical line or direction.
2.
(Geometry) A line or plane falling at right angles on another line or surface, or making equal angles with it on each side.