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Einstein properNoun

  /ˈaɪnstaɪn/ , /ˈaɪnʃtaɪn/
  • Albert Einstein, the world-famous 20th-century theoretical physicist who developed the theory of relativity.
Einstein

einstein noun

  • (photochemistry, dated) One mole of photons, regardless of frequency, as used to measure irradiance.
einsteinium
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