Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The intrinsic property in radiation that produces photochemical activity.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. That property of electromagnetic radiation that leads to the production of photochemical effects

from the GNU version of the Collaborative International Dictionary of English

  • n. The property of radiant energy (found chiefly in solar or electric light) by which chemical changes are produced, as in photography.

from The Century Dictionary and Cyclopedia

  • n. The radiation of heat or light, or that branch of natural philosophy which treats of the radiation of heat and light.
  • n. That property of light which, as may be seen in photography, produces chemical combinations and decompositions.
  • n. In botany, the chemical action of sunlight on plants.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the property of radiation that enables it to produce photochemical effects

Etymologies

actin- + -ism (Wiktionary)

Examples

  • Niépce, a Frenchman, discovered "actinism," that power in the sun's rays which produces a chemical effect; that granite rocks, and stone structures, and statues of metal, "are all alike destructively acted upon during the hours of sunshine, and, but for provisions of Nature no less wonderful, would soon perish under the delicate touch of the most subtile of the agencies of the universe."

    Harvard Classics Volume 28 Essays English and American

  • Frenchman, discovered "actinism," that power in the sun's rays which produces a chemical effect; that granite rocks, and stone structures, and statues of metal "are all alike destructively acted upon during the hours of sunshine, and, but for provisions of

    Walking

  • Light or luminous power to one portion; heat or calorific power to another; and chemical power or actinism to a third.

    The Art of Living in Australia ; together with three hundred Australian cookery recipes and accessory kitchen information by Mrs. H. Wicken

  • The mechanism must be sensitive, as such properties of matter as heat, light, electricity, magnetism, and actinism, are to be handled, caused to vanish and reappear, analyzed and measured.

    Scientific American Supplement, No. 288, July 9, 1881

  • Meanwhile, two or three interesting investigations naturally suggest themselves; to determine, for instance, the relative actinism of blue sky, haze, and clouds; also, the relative exposures proper to give at different hours of the day, at different seasons of the year, and in different countries.

    Scientific American Supplement, No. 520, December 19, 1885

  • Niépce, a Frenchman, discovered “actinism, ” that power in the sun’s rays which produces a chemical effect; that granite rocks, and stone structures, and statues of metal, “are all alike destructively acted upon during the hours of sunshine, and, but for provisions of Nature no less wonderful, would soon perish under the delicate touch of the most subtile of the agencies of the universe.

    Walking [1862]

  • Considering the wondrous richness and variety of the terrestrial life wrought out by the few sunbeams which we catch in our career through space, we may well pause overwhelmed and stupefied at the thought of the incalculable possibilities of existence which are thrown away with the potent actinism that darts unceasingly into the unfathomed abysms of immensity.

    The Unseen World, and Other Essays

  • Ericson, and even more from the influence of his sad holy doubt, a fresh touch of the actinism of the solar truth fell upon the living seed in her heart, and her life burst forth afresh, began to bud in new questions that needed answers, and new prayers that sought them.

    Robert Falconer

  • It is the centre from which an inconceivable amount of force in the shape of light, heat, actinism, and probably other manifestations, is hourly poured forth.

    Story of Creation as Told By Theology and By Science

  • _actinism_, are names of _effects of radiant energy_.

    Scientific American, Volume XLIII., No. 25, December 18, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures.

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.