EXTRADOS

extrados

(noun) the exterior curve of an arch

Source: WordNet® 3.1

Etymology

Noun

extrados (plural extradoses or extrados)

(architecture) The outer or upper curve of an arch.

Coordinate terms

• intrados

Source: Wiktionary

Ex*tra"dos, n. Etym: [F.; pref. extra outside + dos (L. dorsum) the back.] (Arch.)

Definition: The exterior curve of an arch; esp., the upper curved face of the whole body of voussoirs. See Intrados.

Source: Webster’s Unabridged Dictionary 1913 Edition

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