We found 14 dictionaries that define the word electromagnetic waves:

General (7 matching dictionaries)

1. electromagnetic waves: Merriam-Webster
2. electromagnetic waves: Collins English Dictionary
3. electromagnetic waves: Vocabulary.com
4. electromagnetic waves: Wiktionary
5. electromagnetic waves: Dictionary.com
6. Electromagnetic Waves, Electromagnetic waves: Wikipedia, the Free Encyclopedia
7. electromagnetic waves: TheFreeDictionary.com

Business (1 matching dictionary)

8. Electromagnetic waves: Legal dictionary

Computing (1 matching dictionary)

9. Electromagnetic waves: Encyclopedia

Medicine (3 matching dictionaries)

10. electromagnetic waves: Merriam-Webster Medical Dictionary
11. Dorland's Illustrated Medical Dictionary (No longer online)
12. Electromagnetic waves: Medical dictionary

Science (1 matching dictionary)

13. Imagine the Universe! Dictionary (No longer online)

Tech (1 matching dictionary)

14. High-Energy Astrophysics (No longer online)

(Note: See electromagnetic_wave as well.)

Definitions from Wiktionary (electromagnetic wave) ▸ noun:  (physics) Electromagnetic radiation, such as light and radio waves. ▸ Also see electromagnetic_wave Phrases: amplifier of electromagnetic waves, more... ▸ Words similar to electromagnetic waves ▸ Usage examples for electromagnetic waves ▸ Idioms related to electromagnetic waves ▸ Wikipedia articles (New!) ▸ Words that often appear near electromagnetic waves ▸ Rhymes of electromagnetic waves ▸ Invented words related to electromagnetic waves