| 释义 |
ex·tra·dos
\ˈekstrəˌdäs, -ˌdōs, -ˌdō; ekˈstrā]ˌdäs, -rä], ]_dəs\ noun
(plural extrados \-ˌdōz\ ; or extradoses \-äsə̇z, -ōsə̇z, -əsə̇z\)
Etymology: French, from Latin extra outside + French dos back — more at extra-, dossier
1. : the exterior curve of an arch; specifically : the upper curved face of the body of voussoirs which forms the arch
2. : the outer surface of a vault — compare intrados |