Word.ws English Dictionary

light mill

light mill noun: an airtight glass bulb containing a partial vacuum and a set of vanes, mounted on a spindle, which rotate when exposed to light, providing a quantitative measurement of electromagnetic radiation intensity.

light mill: an airtight glass bulb containing a partial vacuum and a set of vanes, mounted on a spindle, which...
Image: Nevit Dilmen, CC BY-SA 3.0, via Wikimedia Commons

Noun

light mill (plural light mills)

  1. An airtight glass bulb containing a partial vacuum and a set of vanes, mounted on a spindle, which rotate when exposed to light, providing a quantitative measurement of electromagnetic radiation intensity.

Synonyms of light mill

Forms of light mill

plurallight mills

Origin of light mill

By analogy with windmill and water mill.

Questions about light mill

What does light mill mean?
Light mill means an airtight glass bulb containing a partial vacuum and a set of vanes, mounted on a spindle, which rotate when exposed to light, providing a quantitative measurement of electromagnetic radiation intensity.
What part of speech is light mill?
Light mill is a noun.
What is the plural of light mill?
The plural of light mill is light mills.

Words near light mill in the dictionary

  1. light meter
  2. light meters
  3. light metro
  4. light microscope
  5. light microscopes
  6. light mill
  7. light millennium
  8. light millenniums
  9. light mills
  10. light minute
  11. light minutes

Source and license

Adapted from Wiktionary: light mill (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “light mill.” Word.ws, https://word.ws/light_mill. Based on Wiktionary, CC BY-SA 4.0.