Definition

1. Adjective:
   • Relating to or constituting plant stomata: Pertaining to the tiny pores or openings on the surfaces of leaves and stems that allow for gas exchange.
   • Relating to or of the nature of or having a mouth or mouthlike opening: Pertaining to any mouth-like aperture or orifice in an organism or structure.

Usage Examples

• Adjective:
  • The rate of water loss is controlled by stomatal closure.
  • Scientists studied the stomatal density on the leaf's epidermis.
  • The organism has a stomatal opening for ingestion.

Advanced Usage

• "stomatal conductance": A measurement of the rate of gas exchange (carbon dioxide, water vapor) through the stomata.
  • High humidity can reduce stomatal conductance.
• "stomatal complex": Refers to the entire structure of the stoma, including the guard cells and the pore.
  • The stomatal complex regulates the pore's size.

Variants and Related Words

• Stoma (noun): The individual pore or mouthlike opening itself.
  • Each stoma is flanked by two guard cells.
• Stomate (noun): A less common variant of "stoma."
• Stomatous (adjective): Having stomata or a mouth.

Synonyms

• Poral: Relating to pores (though less specific to plants).
• Ostiolar: Relating to a small opening, especially in fungi or some plants.

Related Phrases

• "stomatal aperture": The actual opening or gap between the guard cells of a stoma.
  • Light intensity influences the width of the stomatal aperture.
• "stomatal index": A calculated ratio expressing the proportion of stomata to other epidermal cells.
  • The stomatal index is used in paleobotany to estimate past atmospheric CO2 levels.

Adjective

1. relating to or constituting plant stomata
   • stomatal openings
2. relating to or of the nature of or having a mouth or mouthlike opening