actinic ray

actinic ray

n.

Photochemically active radiation, as of the sun.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

actin′ic ray′

n.

a ray of light of short wavelengths, as ultraviolet or violet, that produces photochemical effects.

[1835–45]

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

Thesaurus

Noun

1.

actinic ray - electromagnetic radiation that can produce photochemical reactions actinic radiation electromagnetic radiation, electromagnetic wave, nonparticulate radiation - radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge electromagnetic spectrum - the entire frequency range of electromagnetic waves infrared emission, infrared light, infrared radiation, infrared - electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves light, visible light, visible radiation - (physics) electromagnetic radiation that can produce a visual sensation; "the light was filtered through a soft glass window" ultraviolet, ultraviolet illumination, ultraviolet light, ultraviolet radiation, UV - radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays

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