curvilinear

or cur·vi·lin·e·al

[kur-vuh-lin-ee-er]
adjective
  1. consisting of or bounded by curved lines: a curvilinear figure.
  2. forming or moving in a curved line.
  3. formed or characterized by curved lines.

Origin of curvilinear

1700–10; < Latin curv(us) curve + -i- + linear
Related formscur·vi·lin·e·ar·i·ty [kur-vuh-lin-ee-ar-i-tee] /ˌkɜr vəˌlɪn iˈær ɪ ti/, nouncur·vi·lin·e·ar·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for curvilinearity

curvilinear

curvilineal

adjective
  1. consisting of, bounded by, or characterized by a curved line
  2. along a curved linecurvilinear motion
  3. maths (of a set of coordinates) determined by or determining a system of three orthogonal surfaces
Derived Formscurvilinearity, nouncurvilinearly, 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

Word Origin and History for curvilinearity

curvilinear

adj.

1710, from curvi-, comb. form of Latin curvus (see curve (v.)) + linearis, from linea "line" (see line (n.)). Earlier was curvilineal (1650s).

Online Etymology Dictionary, © 2010 Douglas Harper

curvilinearity in Science

curvilinear

[kûr′və-lĭnē-ər]
  1. Formed, bounded, or characterized by curved lines.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.