stoma
Also stomate. Botany. any of various small apertures, especially one of the minute orifices or slits in the epidermis of leaves, stems, etc., through which gases are exchanged.
Zoology. a mouth or ingestive opening, especially when in the form of a small or simple aperture.
Medicine/Medical. an artificial opening between two hollow organs or between one hollow organ and the outside of the body, constructed to permit the passage of body fluids or waste products.
Origin of stoma
1Other words from stoma
- stomal, adjective
Words Nearby stoma
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use stoma in a sentence
The vast majority of patients choose the urostomy, in which surgeons create a stoma—a beefy red spout protruding from the belly—so that urine can flow from the kidneys, through an intestinal conduit, and out the body.
How to Return to Normal After Having Your Bladder Surgically Removed | Simar Bajaj | July 28, 2022 | TimeThe other type of leaves had more surface holes, known as stomata.
Some redwood leaves make food while others drink water | Sofia Quaglia | May 27, 2022 | Science News For StudentsWhen open, stomata take in carbon dioxide and exhale oxygen.
In blazing heat, some plants open leaf pores — and risk death | Jaime Chambers | January 14, 2022 | Science News For StudentsTo conserve water, the plant will often close its pores, known as the stomata, to prevent evaporation.
One feature they looked at was the stomata, tiny openings in plant leaves that control how much carbon dioxide, water vapor, and oxygen enter and exit.
Fossilized plants give us hints about what ice age forests may have looked like | Kate Baggaley | October 13, 2021 | Popular-Science
Poson oun estin, ho alloioi, kai d theasmetha; pleon men kata to stoma, meion d' kata to Pg 252Greek text hpar te kai tas phlebas.
On the Natural Faculties | GalenBy change in shape of these cells the opening of the stoma is made larger or smaller.
A Civic Biology | George William HunterStomate (Latin stoma, plural Stomata), the breathing-pores of leaves, 144.
The Elements of Botany | Asa Gray
British Dictionary definitions for stoma
/ (ˈstəʊmə) /
botany an epidermal pore, present in large numbers in plant leaves, that controls the passage of gases into and out of a plant
zoology anatomy a mouth or mouthlike part
Origin of stoma
1Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for stoma
[ stō′mə ]
Botany One of the tiny openings in the epidermis of a plant, through which gases and water vapor pass. Stomata permit the absorption of carbon dioxide necessary for photosynthesis from the air, as well as the removal of excess oxygen. Stomata occur on all living plant parts that have contact with the air; they are especially abundant on leaves. A single leaf may have many thousands of stomata. Each stoma is generally between 10 to 30 microns in length and is surrounded by a pair of crescent-shaped cells, called guard cells. The guard cells can change shape and close the stoma in order to prevent the loss of water vapor. See Note at transpiration.
Zoology A mouthlike opening, such as the oral cavity of a nematode.
Medicine A temporary or permanent opening in a body surface, especially the abdomen or throat, that is created by a surgical procedure, such as a colostomy or tracheostomy.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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