ep.i.cy.cle
n.（名词）In Ptolemaic cosmology, a small circle, the center of which moves on the circumference of a larger circle at whose center is Earth and the circumference of which describes the orbit of one of the planets around Earth.本轮：在托勒密宇宙论中的一个小的圆周，其中心在以地球为中心的一个更大的圆周上运动，其轨迹为环绕地球运行的行星的轨道Mathematics A circle whose circumference rolls along the circumference of a fixed circle, thereby generating an epicycloid or a hypocycloid.【数学】 周转圆：一个围绕着另一个固定圆周长滚动的圆，从而产生圆外旋轮线或圆内旋轮线，即外摆线或内摆线
来源：Middle English epicicle 中古英语 epicicle from Late Latin epicyclus 源自 后期拉丁语 epicyclus from Greek epikuklos 源自 希腊语 epikuklos epi- [epi-] epi- [前缀，表.在…之间.] kuklos [circle] * see k wel- kuklos [圆周] *参见 k wel-
【引伸】
ep.icy.clic
