cryptoporticus
noun
cryp·to·por·ti·cus
ˌkriptōˈpōrtə̇kəs
plural cryptoporticus
: a porch, gallery, or ambulatory in ancient Roman architecture that was wholly or partly concealed, had few openings, and served for private communication
Word History
Etymology
Latin, from crypt- + porticus portico
First Known Use
1581, in the meaning defined above