respiratory quotient


Definition of respiratory quotient

: a ratio indicating the relation of the volume of carbon dioxide given off in respiration to that of the oxygen consumed

First Known Use of respiratory quotient

1879, in the meaning defined above

Keep scrolling for more

Learn More about respiratory quotient

Statistics for respiratory quotient

Look-up Popularity

Time Traveler for respiratory quotient

The first known use of respiratory quotient was in 1879

See more words from the same year

Keep scrolling for more

More Definitions for respiratory quotient

respiratory quotient


Medical Definition of respiratory quotient

: the ratio of the volume of carbon dioxide given off in respiration to that of the oxygen consumed that has a value near 1 when the organism is burning chiefly carbohydrates, near 0.7 when chiefly fats, and near 0.8 when chiefly proteins but sometimes exceeding 1 when carbohydrates are being changed to fats for storage abbreviation RQ

More from Merriam-Webster on respiratory quotient Encyclopedia article about respiratory quotient

Comments on respiratory quotient

What made you want to look up respiratory quotient? Please tell us where you read or heard it (including the quote, if possible).


characterized by aphorism

Get Word of the Day daily email!

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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