Pronunciation: [pˈɛɹɪskˌə͡ʊp] (IPA) 
The word "periscope" is spelled as /ˈpɛrɪskəʊp/. The initial sound /p/ is followed by the vowel /ɛ/ and then the consonant cluster /rɪs/. The final syllable of the word is /kəʊp/ and it contains the vowel /ə/ followed by the consonant /k/. The /k/ sound in this word is spelled with the letter 'c'. A periscope is a device used to see over or around an obstacle, typically on a submarine or in military use.
A periscope is an optical instrument used for viewing objects that are not within the direct line of sight, often utilized in submarines or other vehicles to observe surroundings while remaining hidden or submerged. The device consists of a long, tubular structure typically made of metal, with one or more mirrors positioned at specific angles within it. These mirrors function by reflecting light rays, allowing the viewer to see objects located above or around a corner.
The periscope's purpose is to provide a means for observing the external environment while allowing the operator to remain concealed or protected. In a submarine, for example, the periscope extends above the water's surface, allowing the crew to view their surroundings without exposing themselves to potential danger. The mirrors within the periscope reflect the light entering the instrument and direct it to the viewer's eyes, providing a view of the outside world.
The word "periscope" originates from the Greek terms "peri," meaning "around," and "skopein," meaning "to look." Its design and functionality have been adapted and utilized in various fields beyond submarines, including military applications, home security systems, and even in some specialized cameras. Overall, the periscope remains a crucial tool for discreetly observing the external environment in situations where direct visibility is limited or dangerous.
A view on all sides; a general view.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "periscope" derives from the Greek words "peri" meaning "around" and "skopein" meaning "to look". It was formed as a combination of these words in the late 19th century to describe a device that allows one to see objects that are not in the direct line of sight, typically used in submarines and other submerged vessels. The periscope enables the viewer to look around or over obstacles, hence the name "periscope".
