capnometer

noun

cap·​nom·​e·​ter kap-ˈnä-mə-tər How to pronounce capnometer (audio)
: a monitoring device that measures and numerically displays the concentration of carbon dioxide in exhaled air compare capnograph

Word History

Etymology

capno- (in capnograph) + -meter

First Known Use

1983, in the meaning defined above

Time Traveler
The first known use of capnometer was in 1983

Rhymes for capnometer

See All Rhymes for capnometer

Browse Nearby Words

capnograph
capnometer
cap nut
See all Nearby Words

Cite this Entry

“Capnometer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/capnometer. Accessed 9 Jul. 2026.

Copy Citation

Medical Definition

capnometer

noun
cap·​nom·​e·​ter kap-ˈnäm-ə-tər How to pronounce capnometer (audio)
: a monitoring device that measures and numerically displays the concentration of carbon dioxide in exhaled air compare capnograph
capnometry
-trē How to pronounce capnometer (audio)
noun
Love words? Need even more definitions?

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

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of tacit

See Definitions and Examples »

Popular in Grammar & Usage

See More

Is that lie 'bald-faced' or 'bold-faced'?

'A' or 'an'? What about before 'h'? An Indefinite Article Guide

Why is '-ed' sometimes pronounced at the end of a word?

Commonly Misspelled Words

How to Use Em Dashes (—), En Dashes (–) , and Hyphens (-)
See More

Popular in Wordplay

See More

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List

One-Word Oxymorons: Bittersweet, Spendthrift, and More

Ten Words Ending with a Silent ‘T’

The Words of the Week - Jul 10
See More

Popular

See More

Is that lie 'bald-faced' or 'bold-faced'?

14 Phobias You Probably Haven't Heard Of

The Longest Long Words List
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
hangman letters and game
Hangman Lightning Round Figure out which word fits in the blanks.
See All