[in-truh-dos, -dohs, in-trey-dos, -dohs] 
[-dohz, -dohz] , -dos⋅es. Architecture. | the interior curve or surface of an arch or vault. |
in·tra·dos (ĭn'trə-dŏs', -dō', ĭn-trā'dŏs', -dōs')  (click for larger image in new window) n. pl. in·tra·dos (-dōz') or in·tra·dos·es (-dŏs'ĭz) Architecture The inner curve of an arch. [French : intra-, within (from Latin intrā-; see intra-) + dos, back (from Old French, from Latin dorsum).] |
trəˌdɒs