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extrados

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extrados

Main Entry:: ex·tra·dos
Pronunciation:: \ˈek-strə-ˌdäs, -ˌdō; ek-ˈstrā-ˌdäs\
Function:: noun
Inflected Form(s):: plural ex·tra·dos·es \-ˌdä-səz\ or ex·tra·dos \-ˌdōz, -ˌdäs\
Etymology:: French, from Latin extra + French dos back — more at dossier
Date:: 1772

: the exterior curve of an arch — see arch illustration

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