volvelle

日月升落潮汐仪

发音

UK /ˈvɒlˌvɛl/
US /ˈvɑlˌvɛl/

词形变化

volvelles 复数 volvelles

释义与例句

n.
  1. 1.

    A type of slide chart, a paper construction with rotating parts, formerly used for organization and calculation in astronomy and other subjects.

    历史

词源

Inherited from Middle English volvelle, from Medieval Latin volvellum, volvella, from volvō + -ellum.

来源：wiktionary