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单词 perpendicular
释义

WordReference Random House Learner's Dictionary of American English © 2024
per•pen•dic•u•lar /ˌpɜrpənˈdɪkyəlɚ/USA pronunciation   adj. 
  1. Mathematicsvertical;
    straight up and down;
    upright.
  2. Mathematicsmeeting at right angles:Forty-second Street is perpendicular to Fifth Avenue.

n. [countable]
  1. Mathematicsa perpendicular line, plane, or position.
See -pend-.
WordReference Random House Unabridged Dictionary of American English © 2024
per•pen•dic•u•lar  (pûr′pən dikyə lər),USA pronunciation adj. 
  1. Mathematicsvertical;
    straight up and down;
    upright.
  2. Mathematics[Geom.]meeting a given line or surface at right angles.
  3. maintaining a standing or upright position;
    standing up.
  4. having a sharp pitch or slope;
    steep.
  5. Architecture(cap.) noting or pertaining to the last style of English Gothic architecture, prevailing from the late 14th through the early 16th century and characterized by the use of predominantly vertical tracery, an overall linear, shallow effect, and fine intricate stonework.

n. 
  1. Mathematicsa perpendicular line or plane.
  2. an instrument for indicating the vertical line from any point.
  3. an upright position.
  4. a sharply pitched or precipitously steep mountain face.
  5. moral virtue or uprightness;
    rectitude.
  6. Nautical, Naval Termseither of two lines perpendicular to the keel line, base line, or designed water line of a vessel.
  • Old French perpendiculiere
  • Latin perpendiculāris vertical, equivalent. to perpendicul(um) plumb line (see perpend2, -i-, -cule2) + -āris -ar1; replacing Middle English perpendiculer(e) (adjective, adjectival and adverb, adverbial)
  • 1350–1400
per′pen•dic′u•lari•ty, per′pen•dicu•lar•ness, n. 
per′pen•dicu•lar•ly, adv. 
    • 1.See corresponding entry in Unabridged standing. See upright. 

Collins Concise English Dictionary © HarperCollins Publishers::
perpendicular /ˌpɜːpənˈdɪkjʊlə/ adj

  1. Also: normal at right angles to a horizontal plane
  2. denoting, relating to, or having the style of Gothic architecture used in England during the 14th and 15th centuries, characterized by tracery having vertical lines, a four-centred arch, and fan vaulting
  3. upright; vertical
n
  1. a line or plane perpendicular to another
  2. any instrument used for indicating the vertical line through a given point
Etymology: 14th Century: from Latin perpendiculāris, from perpendiculum a plumb line, from per- through + pendēre to hang

perpendicularity /ˌpɜːpənˌdɪkjʊˈlærɪtɪ/ n ˌperpenˈdicularly adv
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