Actinism
the property of radiation by which chemical effects are produced.
Historical Examples
In summer, when the maturing process advances, light and heat increase, and actinism relatively declines.
The Reason Why Anonymous
In the autumn, when the ripening period arrives, light and actinism give way to a greater ratio of heat.
The Reason Why Anonymous
The third constituent of the sunbeam is actinism—its property being to produce chemical effects.
Harper’s New Monthly Magazine, No. XXVI, July 1852, Vol. V Various
As yet, the effects of actinism have been more studied in the inanimate than the organic creation.
Harper’s New Monthly Magazine, No. XXVI, July 1852, Vol. V Various
Because blue glass obstructs many of the luminous rays, but it is perfectly transparent to actinism.
The Reason Why Anonymous
Experiments clearly prove that this change is to be attributed to actinism, and not to heat.
Harper’s New Monthly Magazine, No. XXVI, July 1852, Vol. V Various
actinism, ak′tin-izm, n. the chemical force of the sun’s rays, as distinct from light and heat.
Chambers’s Twentieth Century Dictionary (part 1 of 4: A-D) Various
An instrument for registering the intensity of the chemical influence (actinism) of the suns rays.
Cooley’s Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades…, Sixth Edition, Volume I Arnold Cooley
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a radioactive silver-white metallic element that glows blue in the dark, resembling the rare earths in chemical behavior and valence. Symbol: Ac; atomic number: 89; atomic weight: 227. Historical Examples Other radio-active substances have each several derivatives: actinium has nine, uranium has four. Inventors at Work George Iles actinium, an element or elementary substance obtained […]
- Actinium emanation
. a chemically inert, gaseous, short-lived isotope of radon that is a member of the . Symbol: An; atomic number: 86; atomic weight: 219. Historical Examples These are generally known as radium emanation, thorium emanation, and actinium emanation. A Brief Account of Radio-activity Francis Preston Venable noun a radioisotope of radon that is a decay […]
- Actinium series
the radioactive series that starts with uranium 235 and ends with a stable isotope of lead of mass number 207. noun a radioactive decay series that starts with uranium-235 and ends with lead-207
- Actino-
a combining form with the meaning “ray, beam,” used in the formation of compound words, with the particular senses “radiation” in the physical sciences (actinometer) and “having raylike structures,” “radiate in form” in biology (actinomyces; actinopod). combining form indicating a radial structure: actinomorphic indicating radioactivity or radiation: actinometer before vowels actin-, word-forming element meaning “pertaining […]
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any of several spherical or rod-shaped, aerobic, parasitic bacteria of the genus Actinobacillus, certain species of which, as A. mallei, are pathogenic for animals.