extrados

n. [建]拱背(拱的外缘线)

词形变化

extradoses 复数 extradoses

释义与例句

n.
  1. 1.

    The outer or upper curve of an arch.

    建筑

词汇关系

名词

上位词 1

curve

词源

From French extradossé (“outer curve”) from Latin extra (“outside”) + dos (“back”) (from Latin dorsum).

来源：wiktionary