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intrados
(in trā′däs′)
noun
Archit. the inside curve or surface of an arch or vault
Origin: Fr < L intra, within + Fr dos < L dorsum, the back
See intrados in American Heritage Dictionary 4
noun pl. in·tra·dos (-dōzˌ) or in·tra·dos·es (-dŏsˌĭz)
Architecture
The inner curve of an arch.
Origin:
Origin: French
Origin: : intra-, within (from Latin intrā-; see intra-)
Origin: + dos, back (from Old French, from Latin dorsum)
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intrados
semicircular arch
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