actinic

adjective ac·tin·ic \ ak-ˈti-nik \
Updated on: 15 Nov 2017

Definition of actinic

:of, relating to, resulting from, or exhibiting chemical changes produced by radiant energy especially in the visible and ultraviolet parts of the spectrum
  • actinic light
  • actinic keratosis

actinically

play \-ni-k(ə-)lē\ adverb

Origin and Etymology of actinic

Greek aktīn-, aktís "ray, beam" + 1-ic — more at actin-


Medical Dictionary

actinic

adjective ac·tin·ic \ ak-ˈtin-ik \

medical Definition of actinic

:of, relating to, resulting from, or exhibiting chemical changes produced by radiant energy especially in the visible and ultraviolet parts of the spectrum
  • actinic injury and carcinogenesis
  • Journal of the American Medical Association
  • actinic keratosis

actinically

play \-i-k(ə-)lē\ adverb

Seen and Heard

What made you want to look up actinic? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

a blind with adjustable horizontal slats

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!