periscopism

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English[edit]

Etymology[edit]

periscope +‎ -ism

Noun[edit]

periscopism (uncountable)

  1. Periscopic vision, covering a wide field without changing the direction of the optical axis.
    • 1877, Sir Norman Lockyer, Nature, volume 16, page 151:
      The purpose of the structure is to give periscopism to the eye.
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