envelope of normals

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• evolute — noun Date: circa 1736 the locus of the center of curvature or the envelope of the normals of a curve …   New Collegiate Dictionary

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• Evolute — In the differential geometry of curves, the evolute of a curve is the locus of all its centers of curvature. Equivalently, it is the envelope of the normals to a curve. The original curve is an involute of its evolute. (Compare and… …   Wikipedia

• evolute — /ev euh looht / or, esp. Brit., /ee veuh /, n. Geom. the locus of the centers of curvature of, or the envelope of the normals to, another curve. Cf. involute (def. 5). [1720 30; < L evolutus (ptp. of evolvere to roll out, unfold, EVOLVE)] * * * …   Universalium

• evolute — ev•o•lute [[t]ˈɛv əˌlut[/t]] esp. brit. [[t]ˈi və [/t]] n. math. geom the locus of the centers of curvature of, or the envelope of the normals to, another curve Compare involute 5) • Etymology: 1720–30; < L ēvolūtus; see evolve …   From formal English to slang

• evolute — /ˈivəlut/ (say eevuhlooht), /ˈɛvə / (say evuh ) noun Geometry the locus of the centres of curvature of, or the envelope of the normals to, another curve (called the involute). {Latin ēvolūtus, past participle, rolled out} …  

• evolute — [ev′ə lo͞ot΄] n. [< L evolutus: see EVOLUTION] Geom. a curve that is the locus of the center of curvature of another curve (called the involute); the envelope of the perpendiculars, or normals, of the involute: see INVOLUTE …   English World dictionary

• ev|o|lute — «EHV uh loot», noun. Geometry. a curve that is the locus of the center of curvature of another curve (the involute), or the envelope of the normals to the latter; the curve from which an involute is formed by the unwrapping of a flexible and… …   Useful english dictionary