Bible Dictionaries
Intrados

Webster's Dictionary

(n.) The interior curve of an arch; esp., the inner or lower curved face of the whole body of voussoirs taken together. See Extrados.

Bibliography Information
Webster, Noah. Entry for 'Intrados'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​i/intrados.html. 1828.