stoma
/stom / • noun (pl. stomas or stomata /stomt/) 1 Botany a minute pore in the epidermis of the leaf or stem of a plant, allowing movement of gases in and out. 2 Zoology a small mouth-like opening in some lower animals. 3 Medicine an artificial opening made into a hollow organ, especially the gut or trachea. — ORIGIN Greek, ‘mouth’.
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