What is 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 called?
deferent — (Ptolemaic Astron.) 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. (Webster's 1913.)
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00