Periscope Definition

pĕrĭ-skōp
periscopes
noun
A periscopic lens.
Webster's New World
An optical instrument consisting of a tube holding a system of lenses and mirrors or prisms, so arranged that a person looking through the eyepiece at one end can see objects reflected at the other end: used on submerged submarines, etc.
Webster's New World
A form of viewing device that allows the viewer to see things at a different height level and usually with minimal visibility.
Wiktionary
verb

(intransitive) To rise and peer around, in the manner of a periscope.

Wiktionary

Other Word Forms of Periscope

Noun

Singular:
periscope
Plural:
periscopes

Origin of Periscope

  • From peri- +"Ž -scope.

    From Wiktionary

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periscope