Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The curve described by a point on the circumference of a circle as the circle rolls on the outside of the circumference of a second, fixed circle.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The locus of a point on the circumference of a circle that rolls without slipping on the circumference of another circle.

from the GNU version of the Collaborative International Dictionary of English

  • n. A curve traced by a point in the circumference of a circle which rolls on the convex side of a fixed circle.

from The Century Dictionary and Cyclopedia

  • n. In geometry, a curve generated by the motion of a point on the circumference of a circle which rolls upon the convex side of a fixed circle. These curves were invented by the Danish astronomer Roemer in 1674.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a line generated by a point on a circle rolling around another circle

Etymologies

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