coplanar

[ koh-pley-ner ]

adjective

, Mathematics.

1. being or operating in the same plane.

coplanar

/ kəʊˈpleɪnə /

adjective

1. lying in the same plane

   coplanar lines

Derived Forms

• ˌcoplaˈnarity, noun

Other Words From

• copla·nari·ty noun
• nonco·planar adjective

Word History and Origins

Origin of coplanar¹

1860–65; co- + planar < Late Latin plānāris; plane ¹, -ar ¹

Example Sentences

But although the new study emphasizes the rarity of aligned coplanar dwarf galaxies, such configurations have been observed before.

From Scientific American

The second school suggested that all four wings were coplanar.

From Economist

Since CE equals BE these directions are equally inclined to, and coplanar with, the normal to the mirror.

From Project Gutenberg

I believe the earth’s and moon’s orbits are more or less coplanar, but the earth’s axis tilts.

From New York Times

The proposition shows that the opposite corners of a room are parallel, and that therefore they lie in the same plane, or are coplanar, as is said in higher geometry.

From Project Gutenberg