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Meaning Of Epicycle
n.
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.
n.
A circle which rolls on the circumference of another
circle, either externally or internally.