We found 7 dictionaries that define the word actinic rays:

General (4 matching dictionaries)

1. actinic rays: Vocabulary.com
2. actinic rays: The Wordsmyth English Dictionary-Thesaurus
3. actinic rays: Dictionary.com
4. Actinic rays: Wikipedia, the Free Encyclopedia

Medicine (2 matching dictionaries)

5. actinic rays: Merriam-Webster Medical Dictionary
6. Dorland's Illustrated Medical Dictionary (No longer online)

Tech (1 matching dictionary)

7. Glossary of Meteorology (No longer online)

(Note: See actinic_ray as well.)

Definitions from WordNet (actinic ray) ▸ noun:  electromagnetic radiation that can produce photochemical reactions ▸ Also see actinic_ray Types: ultraviolet, x-rays, gammrays, cosmic rays, alphrays, betrays, more... ▸ Words similar to actinic rays ▸ Usage examples for actinic rays ▸ Idioms related to actinic rays ▸ Wikipedia articles (New!) ▸ Words that often appear near actinic rays ▸ Rhymes of actinic rays ▸ Invented words related to actinic rays