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Stomatal (Adjective)

Relating to or constituting plant stomata; "stomatal openings".

Relational adjectives (pertainyms).

The stomatal density of the leaves was measured to determine the plant's water use efficiency.
Stomatal openings on the underside of the leaf allowed for gas exchange to occur.
The stomatal complex is a critical structure in the regulation of transpiration in plants.
Researchers studied the stomatal responses of crops to different environmental conditions.
The stomatal conductance of the plant was affected by the high levels of ozone in the air.

Relating to or of the nature of or having a mouth or mouthlike opening.

Relational adjectives (pertainyms).

The stomatal pores on the underside of the leaf allowed for gas exchange between the plant and the atmosphere.
The stomatal density of the leaf was higher on the abaxial surface than on the adaxial surface.
The stomatal guard cells regulated the opening and closing of the stomatal aperture in response to environmental stimuli.
The stomatal complex consisted of a pair of guard cells and a pore, which controlled the flow of gases and water vapor.
The stomatal pattern on the leaf surface was used as a characteristic for identifying the plant species.