Perpendicular | Definition of Perpendicular by Merriam-Webster
https://www.merriam-webster.com/dictionary/perpendicular
vertical, perpendicular, plumb mean being at right angles to a base line. vertical suggests a line or direction rising straight upward toward a zenith. the side of the cliff is almost vertical perpendicular may stress the straightness of a line making a right angle with any other line, not necessarily a horizontal one. the parallel bars are perpendicular to the support posts plumb stresses an exact verticality determined (as with a plumb line) by earth's gravity. make sure that the wall is plumb
DA: 86 PA: 38 MOZ Rank: 13