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perpendicular

[ pur-puhn-dik-yuh-ler ]
/ ˌpɜr pənˈdɪk yə lər /
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SEE MORE SYNONYMS FOR perpendicular ON THESAURUS.COM

adjective

noun

RELATED WORDS

standing, vertical, straight, plumb, upright, horizontal, steep, erect, sheer, stand-up, straight-up

Nearby words

peroxysulphuric acid, perp, perp walk, perp., perpend, perpendicular, perpensity, perpent, perpetrable, perpetrate, perpetration

Origin of perpendicular

1350–1400; < Latin perpendiculāris vertical, equivalent to perpendicul(um) plumb line (see perpend2, -i-, -cule2) + -āris -ar1; replacing Middle English perpendiculer(e) (adj. and adv.) < Old French perpendiculiere
SYNONYMS FOR perpendicular
Related forms
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for perpendicular

British Dictionary definitions for perpendicular

perpendicular

/ (ˌpɜːpənˈdɪkjʊlə) /

adjective

Also: normal at right angles to a horizontal plane
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
upright; vertical

noun

geometry a line or plane perpendicular to another
any instrument used for indicating the vertical line through a given point
mountaineering a nearly vertical face
Derived Formsperpendicularity (ˌpɜːpənˌdɪkjʊˈlærɪtɪ), nounperpendicularly, adverb

Word Origin for perpendicular

C14: from Latin perpendiculāris, from perpendiculum a plumb line, from per- through + pendēre to hang
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for perpendicular

perpendicular


adj.

late 15c., from adverb (late 14c.), from Old French perpendiculer, from Latin perpendicularis "vertical, as a plumb line," from perpendiculum "plumb line," from perpendere "balance carefully," from per- "thoroughly" (see per) + pendere "to weigh, to hang" (see pendant). As a noun from 1570s. Related: Perpendicularly; perpendicularity.

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for perpendicular

perpendicular

[ pûr′pən-dĭkyə-lər ]

Adjective

Intersecting at or forming a right angle or right angles.

Noun

A line or plane that is perpendicular to a given line or plane.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.