- Geometry. a curve traced by a point on a radius or an extension of the radius of a circle that rolls, without slipping, on a curve, another circle, or a straight line. Equation: x = aθ − b sin θ, y = a − b cos θ.
- rotating on an axis, as a wheel.
Origin of trochoid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for trochoid
Historical Examples of trochoid
Then any point in the circumference of the half-crown will move through a curve called a ‘trochoid.’Boating
W. B. Woodgate
- the curve described by a fixed point on the radius or extended radius of a circle as the circle rolls along a straight line
- rotating or capable of rotating about a central axis
- anatomy (of a structure or part) resembling or functioning as a pivot or pulley
Word Origin for trochoid
C18: from Greek trokhoeidēs circular, from trokhos wheel
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- Capable of or exhibiting rotation about a central axis.
- Permitting rotation, as a pivot.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.