epicycle
n. 本轮
发音
词形变化
释义与例句
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1.
A small circle whose centre is on the circumference of a larger circle; in Ptolemaic astronomy it was seen as the basis of revolution of the "seven planets", given a fixed central Earth.
本轮
天文Is it not [Philosophie], that […] teacheth miserie, famine and sicknesse to laugh? Not by reason of some imaginarie Epicicles, but by naturall and palpable reasons.
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2.
Any circle whose circumference rolls around that of another circle, thus creating a hypocycloid or epicycloid.
数学 -
3.
A ring of atoms joining parts of an already cyclic compound
化学 -
4.
An ad hoc complication added to a model to make it fit the known data
比喻
词汇关系
上位词 1
词源
From Latin epicyclus, from Ancient Greek ἐπίκυκλος (epíkuklos), from ἐπί (epí, “upon”) + κύκλος (kúklos, “circle”). The ad hoc complication sense is a generalization from the archetype supplied by the Ptolemaic astronomy sense.
来源：wiktionary