dipleidoscope

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noun

An instrument for determining the time of apparent noon. It consists of two mirrors and a plane glass 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 centre is on the meridian.

Scrabble 21
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Meanings

noundipleidoscope (plural dipleidoscopes)

plural dipleidoscopes

  1. astronomyAn instrument for determining the time of apparent noon. It consists of two mirrors and a plane glass 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 centre is on the meridian.

Origin

From diplo- (“double”) + Ancient Greek εἶδος (eîdos, “image”) + -scope.

Full word history & related roots →
Cite this entry
APA

dipleidoscope. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/dipleidoscope

MLA

“dipleidoscope.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/dipleidoscope. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “dipleidoscope,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/dipleidoscope.

Source: dipleidoscope on Wiktionary, CC BY-SA 4.0.