epicycle
n . 本轮
本轮
epicycle n 1 :
a circle that rolls around (
inside or outside )
another circle ;
generates an epicycloid or hypocycloid Epicycle \
Ep "
i *
cy `
cle \,
n . [
L .
epicyclus ,
Gr . ?; '
epi `
upon ?
circle .
See {
Cycle }.]
1 . (
Ptolemaic Astron .)
A circle ,
whose center moves round in the circumference of a greater circle ;
or a small circle ,
whose center ,
being fixed in the deferent of a planet ,
is carried along with the deferent ,
and yet ,
by its own peculiar motion ,
carries the body of the planet fastened to it round its proper center .
[
1913 Webster ]
The schoolmen were like astronomers which did feign eccentrics ,
and epicycles ,
and such engines of orbs .
--
Bacon .
[
1913 Webster ]
2 . (
Mech .)
A circle which rolls on the circumference of another circle ,
either externally or internally .
[
1913 Webster ]
epicyclic
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