Archit. the inside curve or surface of an arch or vault
Origin of intradosFrench from Classical Latin intra, within + French dos from Classical Latin dorsum, the back
nounpl. in·tra·dos, or in·tra·dos·es Architecture
The inner curve of an arch.
Origin of intradosFrench intra- within ( from Latin intrā- ; see intra- . ) dos back ( from Old French) ( from Latin dorsum )