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单词
epitrochoid
释义
WordReference Random House Unabridged Dictionary of American English © 2024
ep•i•tro•choid
(ep′i trō
′
koid),
USA pronunciation
[
Geom.
]
Mathematics
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.
epi
- +
trochoid
1835–45
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更新时间:2025/11/27 0:19:07