perpendicular
UK /ˌpɜː.pənˈdɪk.jə.lə(ɹ)/ · US /ˌpɝ.pənˈdɪk.ju.lɚ/ adjective, noun
Forms perpendiculars
- adjective (geometry) At or forming a right angle (to something). “In most houses, the walls are perpendicular to the floor.”
- adjective Exactly upright; extending in a straight line toward the centre of the earth, etc.
- adjective Independent of or irrelevant to each other; orthogonal.
- noun (geometry) A line or plane that is perpendicular to another.
- noun A device such as a plumb line that is used in making or marking a perpendicular line.
- noun (obsolete, slang) A meal eaten at a tavern bar while standing up.
- adjective (architecture) Of a style of English Gothic architecture from the fourteenth and fifteenth centuries, marked by stiff and rectilinear lines, mostly vertical window-tracery, depressed or four-centre arch, fan-tracery vaulting, and panelled walls.
Synonyms
normal orthogonal perpendicular style English-Gothic English-Gothic architecture plumb line vertical
Antonyms
Etymology
Derived from Middle French perpendiculaire, from Old French perpendiculer, from Latin perpendiculum (“plumb line”).
Webster’s 1913
- adjective 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.
- adjective 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.
- noun A line at right angles to the plane of the horizon; a vertical line or direction.
- noun A line or plane falling at right angles on another line or surface, or making equal angles with it on each side.
Etymology [L. perpendicularis, perpendicularius: cf. F. perpendiculaire. See Perpendicle, Pension.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “perpendicular”, CC BY-SA 4.0. Details