An imaginary circle surrounding the earth, in whose periphery either the heavenly body or the center of the heavenly body's epicycle was supposed to be carried round
A construct of the geocentric model of the solar system which was needed to explain observed planetary motions A deferent is a large circle encircling the Earth, on which an epicycle moves
In the Ptolemaic theory, the large circle around the earth along which the center of epicycles moved
{s} submissive, compliant, respectful; conveying away; pertaining to the vas deferens
In the Ptolemaic system, the large circle centered on the Earth upon which circumference the center of a smaller circle (epicycle) revolves; the planet moves on the epicycle
(Def"er*ent) n An imaginary circle surrounding the earth, in whose periphery either the heavenly body or the center of the heavenly body's epicycle was supposed to be carried round