/per'euh skop"ik/ , adj.
1. Optics. (of certain lenses in special microscopes, cameras, etc.) giving distinct vision obliquely, or all around, as well as, or instead of, in a direct line.
2. pertaining to periscopes or their use.
Also, periscopical .
[ 1795-1805; periskop ( eîn ) to look about (see PERI-, -SCOPE) + -IC ]