periscope
noun/ˈpɛrəskoʊp/
Frequency rank: #14,783 of 20,003 in the WORDED list (wordfreq data)
Meaning
an optical instrument using mirrors or prisms to allow observation from a concealed or submerged position.
Example sentence
The submarine crew used the periscope to observe the surface without surfacing.
Synonyms & related words
More words in ranks 14,701–14,800
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