Longman Dictionary of Contemporary English homepage

Date: 1800-1900
Origin: peri- (from Greek; PERICARDIUM) + Greek skopos 'look'

periscope

 noun
     
Related topics: Military, Navy, Water, Tools
per‧i‧scope [countable]
TTWPMN a long tube with mirrors fitted in it, used to look over the top of something, especially to see out of a submarine
Definition from the Longman Dictionary of Contemporary English
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