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1. Located on the side nearest to the axis of an organ or organism.
2. Of or relating to the side or surface facing or nearest to the axis of an organ, such as the upper surface of a leaf; ventral.


(Botany) facing towards the axis, as the surface of a leaf that faces the stem. Compare abaxial


(ædˈæk si əl)

adj. Bot., Mycol.
situated on the side toward the axis or stem.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.adaxial - nearest to or facing toward the axis of an organ or organismadaxial - nearest to or facing toward the axis of an organ or organism; "the upper side of a leaf is known as the adaxial surface"
biological science, biology - the science that studies living organisms
abaxial, dorsal - facing away from the axis of an organ or organism; "the abaxial surface of a leaf is the underside or side facing away from the stem"
References in periodicals archive ?
They are presented in a different rank than the other gemma leaf pairs and twisted 90[degrees] into the plane of the other two pairs and are arrayed so that their adaxial surfaces are visible when viewed from above.
Unlike damage caused by Cephaleuros spp whose thallus produces a "red-rust" on the adaxial (upper) surface of leave, the necrotic leaf regions caused by S.
The number of salt glands per unit leaf area was reported to be equivalent on the adaxial and abaxial leaf epidermis in Aeluropus littoralis (Gouan) Parl.
Adults lay eggs on margins and veins of new leaves, and after 7 to 9 d, crawlers hatch and initiate gall induction on the adaxial side of the leaves.
Tree trunks, flower buds, flower cushions, basal chupons, cherelles and pods, fan branches, abaxial and adaxial surfaces of leaves were closely observed for mirids on a fortnightly basis.
2006) verificaram necroses na face adaxial da folha em Genipa americana L.
Nymphs were more common on the adaxial surface (55 %) than on the abaxial surface (45 %, n=580) of the leaves, with a mean of 3.
The flowers had two stamens inserted on the adaxial surface of the petals; however, close investigation showed the
Leaves numerous, fleshy, very long and pendent; sheaths white to yellowish, broadly oblong to oblong, 5-6 x 3--5 cm, minute serrated especially toward the apical portion, white-lepidote on both surfaces; blades pendent in mature plants, light green at the adaxial surface, densely white-lepidote on the abaxial surface, linear to narrowly triangular, long attenuated, 60-110 x 1-2 cm, minute serrated at the margin.
schneirlai on Amami-Oshima and Okinawa Islands of Japan is likely to use the enclosed chambers formed by floral bracts of Macaranga tanarius as breeding sites before and during flower anthesis, and feed on nectar on the adaxial surface of flower bracts.
Semi-deciduous, thick blades, well-cutinized epidermises, numerous small leaves, sclerophyllic leaves, hypostomatry, sunken stomata, thickened epidermal cell walls, and abundant abaxial and adaxial trichomes are characteristics of blackbrush plants, as well as typical woody xerophytic and sclerophyllous plants.