stoma

noun

sto·​ma ˈstō-mə How to pronounce stoma (audio)
plural stomata ˈstō-mə-tə How to pronounce stoma (audio) also stomas
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
These examples are automatically compiled from online sources to illustrate current usage. Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Carbon enters the leaves through microscopic holes on their undersides called stomata. Tribune News Service, The Mercury News, 15 Oct. 2024 How Plants Breathe Plants have pores on the surface of their leaves called stomata. Delphine Farmer, Discover Magazine, 2 Aug. 2024 How plants breathe Plants have pores on the surface of their leaves called stomata. Mj Riches, The Conversation, 30 July 2024 An obstruction in the stoma can cause colicky pain and cramping. Anna Giorgi, Verywell Health, 12 July 2024 Some flower species have stomata on their petals, which Sevanto says would be an easy route for releasing water. Elizabeth Anne Brown, Scientific American, 27 Feb. 2024 For those with an ostomy, for example, stylish stoma pouch covers and support belts, or specialized lingerie, such as high-waisted crotchless panties, can make intimacy more comfortable. Claire Sibonney, TIME, 4 June 2024 To perform photosynthesis, leaves need access to carbon dioxide, which enters through tiny pores called stomata on a leaf’s surface. Elizabeth Anne Brown, Scientific American, 27 Feb. 2024 In reality, this can seriously damage houseplants by clogging the stomata in their leaf tissue. Lauren David, Washington Post, 17 Jan. 2024

Word History

Etymology

New Latin, from Greek stomat-, stoma mouth

First Known Use

circa 1684, in the meaning defined at sense 1

Time Traveler
The first known use of stoma was circa 1684

Dictionary Entries Near stoma

Cite this Entry

“Stoma.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/stoma. Accessed 5 Nov. 2024.

Kids Definition

stoma

noun
sto·​ma ˈstō-mə How to pronounce stoma (audio)
plural stomata -mət-ə How to pronounce stoma (audio)
: a small opening which is surrounded by two guard cells and through which moisture and gases pass in and out of the epidermis of a leaf

Medical Definition

stoma

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

Last Updated: - Updated example sentences
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