Webster's Online Dictionary
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Definition: DIPLEIDOSCOPE

Part of Speech Definition
Noun 1. An instrument for determining the time of apparent noon. It consists of two mirrors and a plane glass disposed in the form of a prism, so that, by the reflections of the sun's rays from their surfaces, two images are presented to the eye, moving in opposite directions, and coinciding at the instant the sun's center is on the meridian.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

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Date "Dipleidoscope" was first used in popular English literature: sometime before 1914. (references)

Etymology:Dipleidoscope \Di*plei"do*scope\, noun. [Greek expression double image -scope.]. (references)


Extended Definition: DIPLEIDOSCOPE

Dipleidoscope

A dipleidoscope is an instrument used to determine true noon. It consists of a small telescope and a prism that creates a double image of the sun. When the two images overlap, it is local true noon. The instrument is capable of determining true noon to within ten seconds.

The dipleidoscope was invented by Giovanni Battista Amici in the first half of the 19th century.


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Source: adapted by the editor from Wikipedia, the free encyclopedia; from the article "Dipleidoscope". Image Credit.
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Topics by Level of Interest: DIPLEIDOSCOPE

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Source: the editor, created by/for EVE to gauge likely levels of human interest in linguistically triggered topics (compiled across various sources, such as Wikipedia and specialty expression glosses).