stoma

• a minute epidermal pore in a leaf or stem through which gases and water vapor can pass
• a mouth or mouthlike opening (especially one created by surgery on the surface of the body to create an opening to an internal organ)
• One of the minute apertures between the cells in many serous membranes
• The minute breathing pores of leaves or other organs opening into the intercellular spaces, and usually bordered by two contractile cells
• The line of dehiscence of the sporangium of a fern. It is usually marked by two transversely elongated cells
• A stigma

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