- 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
Examples from the Web for stoma
Historical Examples of stoma
Stomate (Latin Stoma, plural Stomata), the breathing-pores of leaves, 144.The Elements of Botany
By change in shape of these cells the opening of the stoma is made larger or smaller.A Civic Biology
George William Hunter
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.
Word Origin for stoma
"orifice, small opening in an animal body," 1680s, Modern Latin, from Greek stoma (genitive stomatos) "mouth," from PIE root *stom-en-, denoting various body parts and orifices (cf. Avestan staman- "mouth" (of a dog), Hittite shtamar "mouth," Middle Breton staffn "mouth, jawbone," Cornish stefenic "palate"). Surgical sense is attested from 1937.
- A minute opening or pore, as in the surface of a membrane.
- A mouthlike opening, such as the oral cavity of a nematode.
- A surgically constructed opening, especially one made in the abdominal wall to permit the passage of waste.
- 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.