n. 1 a small circle the center of which moves around in the circumference of a larger circle; 2 a circle that rolls around inside or outside another circle
Ptolemy used an epicycle to explain the variation in speed of the planets.
Ptolemy used an epicycle to explain the variation in speed of the planets.
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circle; round figure; orb
square
4 syllables
ep-i-cy-cle
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