noun ( pl. stomas or stomata) Botany
any of the minute pores in the epidermis of the leaf or stem of a plant, forming a slit of variable width that allows movement of gases in and out of the intercellular spaces
• Zoology a small mouthlike opening in some lower animals
• Medicine an artificial opening made into a hollow organ, esp. one on the surface of the body leading to the gut or trachea
