Designating a geometric coordinate system with mutually perpendicular axes.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "rectangular" in a sentence
"(Cake may be left in rectangular pan, if desired.)"
"The first series is incorporating plain rectangular elements which participate in the creation of parabolic volumes."
"I am proud of my quick adaptive thinking, and I dub the rectangular, jerry-rigged rabbit cage the FEMA Trailer."