Trends ofperiscope
View usage for:
periscope
(perɪskoʊp)
Word forms: plural periscopes
countable noun
A periscope is a vertical tube which people inside submarines can look through to see above the surface of the water.
periscope in British English
(ˈpɛrɪˌskəʊp)
noun
any of a number of optical instruments that enable the user to view objects that are not in the direct line of vision, such as one in a submarine for looking above the surface of the water. They have a system of mirrors or prisms to reflect the light and often contain focusing lenses
Word origin
C19: from Greek periskopein to look around; see peri-, -scopeperiscope in American English
(ˈpɛrəˌskoʊp)
noun
1.
a periscopic lens
2.
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.
Word origin
peri- + -scopeImage ofperiscope
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