conservation of mass

noun phrase

: a principle in classical physics: the total mass of any isolated material system is neither increased nor diminished by reactions between the parts

called also conservation of matter

Word History

First Known Use

1884, in the meaning defined above

Time Traveler
The first known use of conservation of mass was in 1884

Dictionary Entries Near conservation of mass

Cite this Entry

“Conservation of mass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/conservation%20of%20mass. Accessed 2 Dec. 2022.

Kids Definition

conservation of mass

: a principle in physics that states that mass can neither be created nor destroyed and that the total mass of any material system is neither increased nor decreased by reactions between the parts

called also conservation of matter

Medical Definition

conservation of mass

noun

: a principle in classical physics: the total mass of any material system is neither increased nor diminished by reactions between the parts

called also conservation of matter, law of conservation of matter

More from Merriam-Webster on conservation of mass

Love words? Need even more definitions?

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


Challenging Words You Should Know

  • hedgehog reading a book
  • Often used to describe “the march of time,” what does inexorable mean?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ