Perpendicular
Webster's Dictionary [1]
(1): ( n.) A line at right angles to the plane of the horizon; a vertical line or direction.
(2): ( n.) A line or plane falling at right angles on another line or surface, or making equal angles with it on each side.
(3): ( a.) 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.
(4): ( a.) At right angles to a given line or surface; as, the line ad is perpendicular to the line bc.
Cyclopedia of Biblical, Theological and Ecclesiastical Literature [2]
Bibliography Information McClintock, John. Strong, James. Entry for 'Perpendicular'. Cyclopedia of Biblical, Theological and Ecclesiastical Literature. https://www.studylight.org/encyclopedias/eng/tce/p/perpendicular.html. Harper & Brothers. New York. 1870.
