or rec·ti·lin·e·al

[ rek-tl-in-ee-er ]
/ ˌrɛk tlˈɪn i ər /


forming a straight line.
formed by straight lines.
characterized by straight lines.
moving in a straight line.

Origin of rectilinear

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

OTHER WORDS FROM rectilinear

rec·ti·lin·e·ar·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for rectilinear

British Dictionary definitions for rectilinear



/ (ˌrɛktɪˈlɪnɪə) /


in, moving in, or characterized by a straight line or linesthe rectilinear propagation of light
consisting of, bounded by, or formed by a straight line or lines

Derived forms of rectilinear

rectilinearly or rectilineally, adverb
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

Scientific definitions for rectilinear

[ rĕk′tə-lĭnē-ər ]

Relating to, consisting of, or moving in a straight line or lines.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.