light mill

短语

词形变化

light mills 复数 light mills

释义与例句

n.
  1. 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.

词源

By analogy with windmill and water mill.

来源：wiktionary