• synonyms


See more synonyms for actinic on Thesaurus.com
  1. pertaining to actinism.
Show More

Origin of actinic

First recorded in 1835–45; actin- + -ic
Related formsac·tin·i·cal·ly, adverbnon·ac·tin·ic, adjectivenon·ac·tin·i·cal·ly, adverbun·ac·tin·ic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for actinic

synthetic, actinic, alchemical, enzymatic, synthetical

Examples from the Web for actinic

Historical Examples of actinic

  • But the figure passed beyond the actinic glare and vanished.

    Astounding Stories of Super-Science, March 1930


  • They were terrific words too, from aortic and actinic 232 in the a's to genuflections in the g's.

    The Annals of Ann

    Kate Trimble Sharber

  • For this reason, it is obvious that it must not be carelessly exposed to actinic light.

  • In what season of the year is the actinic power of light the greatest?

  • Because of the actinic, or chemical power of the rays of the sun.

British Dictionary definitions for actinic


  1. (of radiation) producing a photochemical effect
Show More
Derived Formsactinically, adverbactinism, noun

Word Origin for actinic

C19: from actino- + -ic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

actinic in Medicine


  1. Of or relating to the chemically active rays of the electromagnetic spectrum.
Show More
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.