noun

periscope

periscope

The submarine raised its periscope.

The submarine raised its periscope.

He used a periscope to see over the crowd.

He used a periscope to see over the crowd.

((a periscope)) an optical instrument for observation from a concealed position. The submarine raised its periscope.

Synonyms: viewfinder, spyglass

From Greek 'peri-' (around) and 'skopein' (to look). Literally 'to look around'.

Imagine a submarine 'peeking around' with its scope above the water.

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