Stoma

usgb/ˈstəʊmə/
noun

A small opening, like a mouth, in a plant or an animal that allows gas or liquid to pass in or out.

Through the stoma, a plant breathes in carbon dioxide and breathes out oxygen.
Visual representation of "stoma" - A small opening, like a mouth, in a plant or an animal that allows gas or liquid to pass in or out.

Often appears as...

  • stoma opening
  • close stoma

Usage tips

Technical

Definition 1 of 2
Visual representation of "stoma"
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Plant Breathing

Like nostrils for plants, stomata manage gas exchange for photosynthesis.

Illustration for Plant Breathing
Botanists study how stoma size changes in response to sunlight.
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Non-human Usage

Stoma is specifically for plant and animal biology contexts, not human anatomy.

Illustration for Non-human Usage
Researchers observed how the guards cells control the stoma in leaves.
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Climate Connection

Stomata can indicate environmental conditions and are important in climate studies.

Illustration for Climate Connection
Ancient plant stomata suggest a high carbon dioxide concentration in the past.
Visual representation of the word "Stoma"

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