Definitions

from The Century Dictionary.

  • noun In geometry, the curve traced by a point in the plane of a circle which rolls on the convex side of a fixed circle.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Geom.) A kind of curve. See epicycloid, any trochoid.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A geometric curve traced by a fixed point on one circle which rotates around the perimeter of another circle. Examples include the shape of the Wankel engine

Etymologies

Sorry, no etymologies found.

Examples

  • Mazda's new RX-8 sports car is unusual in its use of the rotary engine invented by Felix Wankel: a triangular rotor inside a combustion chamber that's a particular case of epitrochoid.

    Mazda: rotary engine comeback

  • Mazda's new RX-8 sports car is unusual in its use of the rotary engine invented by Felix Wankel: a triangular rotor inside a combustion chamber that's a particular case of epitrochoid.

    Archive 2003-10-01

  • The _ellipse_, then, is described by these arrangements because it is a special form of the epitrochoid; and various other epitrochoids may be traced with Suardi's pen by substituting other wheels, with different numbers of teeth, for a in Fig. 43.

    Scientific American Supplement, No. 470, January 3, 1885

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