Per`pen*dic"u*lar (?), a. [L.
perpendicularis, perpendicularius: cf. F.
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. (Geom.) At right angles to a given
line or surface; as, the line ad is perpendicular to the
line bc.
Perpendicular style (Arch.), 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.
Per`pen*dic"u*lar (?), n.
1. A line at right angles to the plane of the
horizon; a vertical line or direction.
2. (Geom.) A line or plane falling at
right angles on another line or surface, or making equal angles with
it on each side.
