- being or operating in the same plane.
Origin of coplanar
1860–65; co-Related formsco·pla·nar·i·ty, nounnon·co·pla·nar, adjective
< Late Latin plānāris;
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for coplanar
Historical Examples of coplanar
Again, any coplanar system of forces can be replaced by a single force R acting at any assigned point O, together with a couple G.
Coplanar substitution in four hydrogen atoms would involve the pushing apart of the iodine atoms in four horizontal directions.
A figure formed by four coplanar points is named a complete quadrangle, or, shorter, a four-point.
British Dictionary definitions for coplanar
Derived Formscoplanarity, noun
- lying in the same planecoplanar lines
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for coplanar
Online Etymology Dictionary, © 2010 Douglas Harper