rectilinear

[rek-tl-in-ee-er]
adjective
1.
forming a straight line.
2.
formed by straight lines.
3.
characterized by straight lines.
4.
moving in a straight line.
Also, rectilineal.


Origin:
1650–60; < Late Latin rēctilīne(us) (rēcti- recti- + līne(a) line1 + -us adj. suffix) + -ar1

rectilinearly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
rectilinear or rectilineal (ˌrɛktɪˈlɪnɪə)
 
adj
1.  in, moving in, or characterized by a straight line or lines: the rectilinear propagation of light
2.  consisting of, bounded by, or formed by a straight line or lines
 
rectilineal or rectilineal
 
adj
 
recti'linearly or rectilineal
 
adv
 
recti'lineally or rectilineal
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

rectilinear
"forming a straight line," 1659, from rectiline (1570), from L.L. rectilineus, from rectus "straight" + linea "line."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
rectilinear   (rěk'tə-lĭn'ē-ər)  Pronunciation Key 
Relating to, consisting of, or moving in a straight line or lines.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Neither followed the rectilinear path set out for them by their parents.
Her capsule would preserve artifacts in two rectilinear containers, encased in
  a resin figure resembling a swan.
His studio is one of two elegant rectilinear buildings-the other is his
  house-in a large, walled, lushly gardened compound.
The terminal is a stucco-covered masonry building composed of several
  flat-roofed, rectilinear blocks arranged symmetrically.
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