cotinine

noun
co·​tin·​ine | \ ˈkō-tə-ˌnēn How to pronounce cotinine (audio) , -ˌnīn How to pronounce cotinine (audio) \

Definition of cotinine

: an alkaloid C10H12N2O that is the principal metabolite of nicotine

Examples of cotinine in a Sentence

Recent Examples on the Web Young people's blood was tested for levels of serum cotinine, a metabolite of nicotine; 0.05 to 10 nanograms per milliliter identified exposure to secondhand smoke. Allen Kim, CNN, "Over a third of American kids who don't smoke are exposed to it anyways, study finds. Most are below the poverty line.," 15 Aug. 2019 For verification, participants took a saliva test that detects cotinine, an indicator of nicotine exposure. Catherine Ho, San Francisco Chronicle, "Can Facebook help you quit smoking? Study indicates yes," 24 May 2018

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

First Known Use of cotinine

1893, in the meaning defined above

History and Etymology for cotinine

probably anagram of nicotine

Keep scrolling for more

Learn More about cotinine

Time Traveler for cotinine

Time Traveler

The first known use of cotinine was in 1893

See more words from the same year

Statistics for cotinine

Cite this Entry

“Cotinine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cotinine. Accessed 26 Jan. 2021.

Keep scrolling for more

More Definitions for cotinine

cotinine

noun
co·​tin·​ine | \ ˈkōt-ᵊn-ˌēn How to pronounce cotinine (audio) , -ˌīn How to pronounce cotinine (audio) \

Medical Definition of cotinine

: an alkaloid C10H12N2O that is the principal metabolite of nicotine and is widely used as an indicator of recent exposure to nicotine

Comments on cotinine

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

WORD OF THE DAY

Test Your Vocabulary

Slippery Words Quiz—Changing with the Times

  • ducreux self portrait yawning
  • What is an earlier meaning of nice?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
 AlphaBear 2

Spell words. Make bears.

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!