stoma

noun
sto·​ma | \ ˈstō-mə How to pronounce stoma (audio) \
plural stomata\ ˈstō-​mə-​tə How to pronounce stomata (audio) \ also stomas

Definition of stoma

1 : any of various small simple bodily openings especially in a lower animal
2 : one of the minute openings in the epidermis of a plant organ (such as a leaf) through which gaseous interchange takes place also : the opening with its associated cellular structures
3 : an artificial permanent opening especially in the abdominal wall made in surgical procedures

Examples of stoma in a Sentence

Recent Examples on the Web As Swann notes, the gas exchange from each stoma — and indeed from each leaf — is, on its own, tiny. Quanta Magazine, "Forests Emerge as a Major Overlooked Climate Factor," 9 Oct. 2018 In layman’s terms, stomata are tiny openings on leaves’ surfaces that let in CO2 but expel oxygen and water. Meilan Solly, Smithsonian, "Smithsonian Scientists Need Ginkgo Leaves to Study Climate Change—They Need Your Help," 6 Aug. 2019 Other stomas can be located on the abdomen for waste removal. Stephanie Innes, azcentral, "What's next for Hacienda HealthCare after '6 to 12' maggots found on patient?," 17 June 2019 But with billions of stomata acting in concert, a single tree can evaporate hundreds of liters of water per day — enough to fill several bathtubs. Quanta Magazine, "Forests Emerge as a Major Overlooked Climate Factor," 9 Oct. 2018 Colostomy patients currently have no control over their waste functions and must wear bags over their stomas that must be emptied multiple times a day. Ron Hurtibise, Sun-Sentinel.com, "Bluetooth-operated bionic sphincter controller close to human trial phase," 9 Apr. 2018 At that point, the radiance of the sun can be exploited for sugar-making while the succulent’s stomata stay safely shut. Natalie Angier, New York Times, "As Rains Ease in the West, Cactuses Shine Brighter Than Ever," 24 Apr. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'stoma.' 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 stoma

circa 1684, in the meaning defined at sense 1

History and Etymology for stoma

New Latin, from Greek stomat-, stoma mouth

Keep scrolling for more

Learn More about stoma

Time Traveler for stoma

Time Traveler

The first known use of stoma was circa 1684

See more words from the same year

Statistics for stoma

Cite this Entry

“Stoma.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/stoma. Accessed 10 December 2019.

Keep scrolling for more

More Definitions for stoma

stoma

noun
sto·​ma | \ ˈstō-mə How to pronounce stoma (audio) \
plural stomas

Medical Definition of stoma

1 : any of various small simple bodily openings especially in a lower animal
2 : an artificial permanent opening especially in the abdominal wall made in surgical procedures a colostomy stoma

More from Merriam-Webster on stoma

Rhyming Dictionary: Words that rhyme with stoma

Britannica.com: Encyclopedia article about stoma

Comments on stoma

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

WORD OF THE DAY

to state or do over again or repeatedly

Get Word of the Day daily email!

Test Your Vocabulary

Semantic Drift Quiz

  • a twisty river
  • Which of the following was once a synonym for fun?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Syn City

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!