pertaining to actinism.

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 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for actinic

British Dictionary definitions for actinic



(of radiation) producing a photochemical effect
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

Medicine definitions for actinic




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