Englishfor English speakers
adaxial
—
adjective
nearest to or facing toward the axis of an organ or organism
the upper side of a leaf is known as the adaxial surface
stoma
—
noun
(= pore)
a minute epidermal pore in a leaf or stem through which gases and water vapor can pass
—
noun
a mouth or mouthlike opening (especially one created by surgery on the surface of the body to create an opening to an internal organ)