epicycle

1. Venus goes through a full set of phases, proving that it must orbit around the sun, not the center of the epicycle.
   金星亦有盈亏，证明它必定是环绕太阳运行，而不是均轮的中心。
2. The epicycle theory and emphasizing
   次轮说、强调太阳；宗动天与永
3. The computer aided analysis of the epicycle transmission in construction machinery
   工程机械行星变速箱计算机辅助分析

noun

1. a circle that rolls around (inside or outside) another circle