Periscope

Definitions

1. A form of viewing device that allows the viewer to see things at a different height level and usually with minimal visibility.
2. A general or comprehensive view.
   obsolete

Equivalents

Examples

“The waters grew suddenly lighter, and my spirits rose accordingly. I shouted down to those below that I saw⟳ daylight ahead, and a great shout⟳ of thanksgiving reverberated through the ship. A moment later we emerged into sunlit water, and immediately I raised the periscope and looked about me upon the strangest landscape I had ever seen.”

“[…] will show⟳ it not only enlarging the periscope of knowledge, but contributing to the amelioration of the condition of unfortunate and suffering humanity […]”

CEFR level