guard cell
(guard-cell)
2 syllables
Definition
noun. One of the paired cells in the epidermis of a plant that control the opening and closing of a stoma of a leaf.
Example Sentence
The guard cells swell with water to open the stoma, allowing gas exchange.
More Example Sentences
When the plant is dehydrated, the guard cells lose water and close the stoma.
Synonyms
stomatal cell; epidermal cell; plant cell
Antonyms
non-guard cell; subsidiary cell; root cell
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guard cell
