respiratory quotient

noun

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

Time Traveler for respiratory quotient

Time Traveler

The first known use of respiratory quotient was in 1879

See more words from the same year

Statistics for respiratory quotient

Cite this Entry

“Respiratory quotient.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/respiratory%20quotient. Accessed 10 Jul. 2020.

Keep scrolling for more

More Definitions for respiratory quotient

respiratory quotient

noun

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

Britannica.com: 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).

WORD OF THE DAY

See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a closeup of a sunflower
  • Which of the following words means “of or relating to summer”?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Dictionary Devil

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

TAKE THE QUIZ
Love words? Need even more definitions?

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