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Definition of: stoma
(stō′mə) noun plural sto·ma·ta (stō′mə·tə, stom′ə·tə)
1. A minute orifice; pore.
2. Biol. An aperture in the walls of blood vessels or in serous membranes, or in the epidermis of leaves, young stems, etc. [<Gk. stoma mouth]
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