We found 24 dictionaries that define the word actinometer:

General (20 matching dictionaries)

1. actinometer: Merriam-Webster
2. actinometer: Oxford Learner's Dictionaries
3. actinometer: American Heritage Dictionary of the English Language
4. actinometer: Collins English Dictionary
5. actinometer: Vocabulary.com
6. actinometer: Wordnik
7. actinometer: Wiktionary
8. actinometer: Webster's New World College Dictionary, 4th Ed.
9. actinometer: Infoplease Dictionary
10. actinometer: Dictionary.com
11. Actinometer: Wikipedia, the Free Encyclopedia
12. Actinometer: Online Plain Text English Dictionary
13. actinometer: Webster's Revised Unabridged, 1913 Edition
14. actinometer: Rhymezone
15. Actinometer: AllWords.com Multi-Lingual Dictionary
16. actinometer: FreeDictionary.org
17. actinometer: The Phrontistery - A Dictionary of Obscure Words
18. actinometer: Mnemonic Dictionary
19. actinometer: TheFreeDictionary.com
20. actinometer: Merriam-Webster

Computing (1 matching dictionary)

21. actinometer: Encyclopedia

Medicine (1 matching dictionary)

22. actinometer: Merriam-Webster Medical Dictionary

Science (1 matching dictionary)

23. Actinometer: Eric Weisstein's World of Physics

Tech (1 matching dictionary)

24. Glossary of Meteorology (No longer online)

(Note: See actinometers as well.)

Definitions from Wiktionary (actinometer) ▸ noun:  (physics) A device used to measure the heating power of electromagnetic radiation, especially that of solar radiation. Similar: pyranometer, actinograph, absorptiometer, dynactinometer, actinophone, actimeter, actometer, photoradiometer, radiometer, actinography, more... Types: photometer, luxmeter, luminometer, candela, nitrogen dioxide, carbon dioxide, radiometer, more... Adjectives: new, standard, sensitive, chlorine, convenient, continuous, digital, simple, electrochemical, reversible, electronic ▸ Words similar to actinometer ▸ Usage examples for actinometer ▸ Idioms related to actinometer ▸ Wikipedia articles (New!) ▸ Popular adjectives describing actinometer ▸ Words that often appear near actinometer ▸ Rhymes of actinometer ▸ Invented words related to actinometer