| 释义 |
epicycle/ˈepisaik(ə)l/n. 1 Geom. a small circle whose centre moves round the circumference of a larger one 【几】周转圆(圆心沿大圆圆周移动的圆) 2 hist. any such circle used to describe planetary orbits in the Ptolemaic system [史义]本轮(托勒密天动学说中用来描述行星轨道的圆) □ epicyclic /-ˈsaiklik, -ˈsiklik/ adj.[Middle English via Old French or Late Latin epicyclus from Greek epikuklos (as EPI-, kuklos ‘circle’)] |