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radium emanation

noun, Chemistry.
(formerly) radon.
Origin of radium emanation
First recorded in 1900-05 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for radium emanation
Historical Examples
  • Niton, or radium emanation, is one of the products of the disintegration of radium.

    Meteorology Charles Fitzhugh Talman
  • "He must be using a ray of some sort, possibly a radium emanation," he muttered to himself.

  • The radium emanation is a gas about 111 times heavier than hydrogen; to this gas Sir William Ramsay has given the name niton.

  • Contact with radium emanation results in a deposit of the fatal radium-D, which in 40 years is but half removed.

    Darwin and Modern Science A.C. Seward and Others
  • A large quantity of radium emanation was compressed into a fine glass tube A, about 1.5 cm.

    A Brief Account of Radio-activity Francis Preston Venable
  • These are generally known as radium emanation, thorium emanation, and actinium emanation.

    A Brief Account of Radio-activity Francis Preston Venable
  • Mix very slowly and quietly in order not to release too much of the radium emanation.

    Valere Aude Louis Dechmann

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