We found 9 dictionaries that define the word law of conservation of matter:

General (6 matching dictionaries)

1. law of conservation of matter: Vocabulary.com
2. law of conservation of matter: Dictionary.com
3. law of conservation of matter: Rhymezone
4. law of conservation of matter: FreeDictionary.org
5. law of conservation of matter: Mnemonic Dictionary
6. law of conservation of matter: TheFreeDictionary.com

Computing (1 matching dictionary)

7. law of conservation of matter: Encyclopedia

Medicine (1 matching dictionary)

8. law of conservation of matter: Merriam-Webster Medical Dictionary

Science (1 matching dictionary)

9. Chemistry Dictionary (No longer online)

Definitions from WordNet (law of conservation of matter) ▸ noun:  a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system ▸ Words similar to law of conservation of matter ▸ Usage examples for law of conservation of matter ▸ Idioms related to law of conservation of matter ▸ Wikipedia articles (New!) ▸ Words that often appear near law of conservation of matter ▸ Rhymes of law of conservation of matter ▸ Invented words related to law of conservation of matter