evolute

[ev-uh-loot, ee-vuh-]

noun

Geometry.

1. the locus of the centers of curvature of, or the envelope of the normals to, another curve.

evolute

/ ˈɛvəˌluːt /

noun

1. a geometric curve that describes the locus of the centres of curvature of another curve (the involute ). The tangents to the evolute are at right angles to the involute

adjective

1. biology having the margins rolled outwards

Word History and Origins

Origin of evolute¹

1720–30; < Latin ēvolūtus (past participle of ēvolvere to roll out, unfold, evolve )

Word History and Origins

Origin of evolute¹

C19: from Latin ēvolūtus unrolled, from ēvolvere to roll out, _evolve

Example Sentences

The Russian cars listed were five Lada models, produced by Russia's largest carmaker Avtovaz, as well as the UAZ, Aurus and Moskvich brands, and Evolute electric cars.

Read more on Reuters

It matters little whether a person can correctly derive the words telegraph, tangent, ellipse, evolute, etc., if the correct idea is present in his mind when he uses them.

Read more on Project Gutenberg

The intrinsic equation is s = 4a sin ψ, and the equation to the evolute is s = 4a cos ψ, which proves the evolute to be a similar cycloid placed as in fig.

Read more on Project Gutenberg

His enquiries into evolutes enabled him to prove that the evolute of a cycloid was an equal cycloid, and by utilizing this property he constructed the isochronal pendulum generally known as the cycloidal pendulum.

Read more on Project Gutenberg

This is the evolute of the curve.

Read more on Project Gutenberg