on the side that is towards the axis or central line, usually on the upper side

listen to the pronunciation of on the side that is towards the axis or central line, usually on the upper side
İngilizce - İngilizce
adaxial

it has been transformed, except in a few taxa where lobules are always explanate, into a galeate water-sac, which is formed wholly from the lobule, with the external surface from the adaxial leaf surface.