selenium eye

noun

A device consisting of a closeable ball of blackened wood surrounding a glass lens that focuses light onto a selenium cell attached to a galvanometer; used by astronomers to measure the light variations of a heavenly body.

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Meanings

nounselenium eye (plural selenium eyes)

plural selenium eyes

  1. historicalastronomyA device consisting of a closeable ball of blackened wood surrounding a glass lens that focuses light onto a selenium cell attached to a galvanometer; used by astronomers to measure the light variations of a heavenly body.
Cite this entry
APA

selenium eye. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/selenium%20eye

MLA

“selenium eye.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/selenium%20eye. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “selenium eye,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/selenium%20eye.

Source: selenium eye on Wiktionary, CC BY-SA 4.0.