arbelos

发音

US

词形变化

arbeloses 复数 arbeloses

释义与例句

n.
  1. 1.

    A plane region bounded by a semicircle of diameter 1, connected to semicircles of diameters r and (1 − r), all oriented the same way and sharing a common baseline.

    数学

词源

From Ancient Greek ἄρβηλος (árbēlos) or ἄρβυλος (árbulos), literally "shoemaker's knife".

来源：wiktionary