epitrochoid
[ ep-i-troh-koid ]
/ ˌɛp ɪˈtroʊ kɔɪd /
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Geometry.
a plane curve generated by the motion of a fixed point on the radius or extension of the radius of a circle that rolls externally, without slipping, on a fixed circle. The epitrochoid is a generalization of the epicycloid.
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Set some time apart to test your bracket symbol knowledge, and see if you can keep your parentheses, squares, curlies, and angles all straight!
Question 1 of 7
Let’s start with some etymology: What are the origins of the typographical word “bracket”?
First appeared around 1750, and is related to the French word “braguette” for the name of codpiece armor.
First appeared in 1610, based on the French word “baguette” for the long loaf of bread.
First appeared in 1555, and is related to the French word “raquette” for a netted bat.
TAKE THE QUIZ TO FIND OUT Words nearby epitrochoid
epitomist, epitomize, epitope, epitrachelion, epitrichium, epitrochoid, epitympanic, epitympanum, Epivir, epixylous, epizeuxis
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for epitrochoid
The curve may be regarded as an epitrochoid (see Epicycloid) in which the rolling and fixed circles have equal radii.