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helioscope

From Wiktionary, the free dictionary

English

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Etymology

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From helio- +‎ -scope.

Pronunciation

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  • Audio (US):(file)

Noun

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helioscope (plural helioscopes)

  1. (astronomy) An apparatus for viewing the Sun without harming the eye, by means of an optical filter that attenuates most of sunlight while allowing only a small amount of the solar radiation.

Translations

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