guard cell
one of a pair of crescent-shaped cells that surround a plant's stoma; changes in the turgidity of the cells cause the opening and closing of the stoma.
en-GB/ˈɡɑːd ˈsɛl/
en-US/ˈɡɑɹd ˈsɛl/
one of a pair of crescent-shaped cells that surround a plant's stoma; changes in the turgidity of the cells cause the opening and closing of the stoma.