carbon dioxide

noun

Definition of carbon dioxide

: a heavy colorless gas CO2 that does not support combustion, dissolves in water to form carbonic acid, is formed especially in animal respiration and in the decay or combustion of animal and vegetable matter, is absorbed from the air by plants in photosynthesis, and is used in the carbonation of beverages

Examples of carbon dioxide in a Sentence

Recent Examples on the Web

In a little more than three decades, the city's goal is for carbon emissions to be about two tons of carbon dioxide or equivalent gases for each city resident. Steve Harrison, charlotteobserver, "Charlotte City Council approves sweeping pledge to lower carbon emissions," 25 June 2018 The government has made strides in curbing smog and slowing the growth of emissions of carbon dioxide and other planet-warming gases. Chris Buckley, New York Times, "In a High-Stakes Environmental Whodunit, Many Clues Point to China," 24 June 2018 That means a forest can take in as much carbon dioxide as some entire countries emit. Brian Resnick, Vox, "10 science stories in 2018 that made us go, “Whoa, that’s awesome”," 18 Dec. 2018 But in the face of this existential threat, cities also present the best places to curb emissions: Though urban areas generate 70 percent of the world’s carbon dioxide, that also makes them a good place to start making a difference. Patrick Sisson, Curbed, "As cities confront climate change, is density the answer?," 11 Dec. 2018 The burning of coal, oil and gas release carbon dioxide, which warms the Earth . Seth Borenstein, The Seattle Times, "Climate reality check: Global carbon pollution up in 2018," 5 Dec. 2018 For example, the mass spectrometer, or MASPEX instrument, will scour the space above Europa for methane, water, ammonia, carbon monoxide, molecular nitrogen, carbon dioxide, and low-order organic compounds. Eric Berger, Ars Technica, "A congressman’s loss clouds the future of two demanding missions to Europa," 3 Dec. 2018 Doctors believe that the bacteria in your gut tends to ferment these carbohydrate sugars, creating gases like carbon dioxide, hydrogen, and methane in the GI tract, Dr. Eugenio says. Colleen Stinchcombe, Woman's Day, "Why Am I Always Bloated?," 29 Oct. 2018 Other tasks for Zabel included looking at the quality of the harvest, picking up microbiological samples and checking on the systems (light, temperature regulation, and air supply enriched by nutrients and carbon dioxide). Elizabeth Howell, Space.com, "Antarctica Greenhouse Produces Cucumbers, Tomatoes and More in Mars-Like Test," 24 Sep. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'carbon dioxide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of carbon dioxide

1867, in the meaning defined above

Keep scrolling for more

Learn More about carbon dioxide

Share carbon dioxide

Statistics for carbon dioxide

Last Updated

13 Jan 2019

Look-up Popularity

Time Traveler for carbon dioxide

The first known use of carbon dioxide was in 1867

See more words from the same year

Keep scrolling for more

More Definitions for carbon dioxide

carbon dioxide

noun

English Language Learners Definition of carbon dioxide

: a gas that is produced when people and animals breathe out or when certain fuels are burned and that is used by plants for energy

carbon dioxide

noun
carbon di·​ox·​ide | \ -dī-ˈäk-ˌsīd\

Kids Definition of carbon dioxide

: a heavy colorless gas that is formed by burning fuels, by the breakdown or burning of animal and plant matter, and by the act of breathing and that is absorbed from the air by plants in photosynthesis

carbon dioxide

noun

Medical Definition of carbon dioxide

: a heavy colorless gas CO2 that does not support combustion, dissolves in water to form carbonic acid, is formed especially in animal respiration and in the decay or combustion of animal and vegetable matter, is absorbed from the air by plants in photosynthesis, and is used in the carbonation of beverages

Keep scrolling for more

More from Merriam-Webster on carbon dioxide

Rhyming Dictionary: Words that rhyme with carbon dioxide

Spanish Central: Translation of carbon dioxide

Britannica.com: Encyclopedia article about carbon dioxide

Comments on carbon dioxide

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

WORD OF THE DAY

tremendous in size, volume, or degree

Get Word of the Day daily email!

Test Your Vocabulary

Homophone Quiz

  • three-bears-two-of-them-look-like-theyre-whispering-to-a-third-bear-who-looks-chuffed-to-be-the-center-of-attention
  • In order to judge how people felt, the senator's office hired a firm to take a ______.
True or False

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

TAKE THE QUIZ
Word Winder's CrossWinder

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!