• (America) IPA: /ˌæˈbæk.si.əl/ or IPA: /æbˈæk.si.əl/

abaxial (not comparable)

1. (botany, zoology) Of a side that is facing away from the axis or central line, such as the underside of a leaf; or the back of an animal. [Mid 19^th century.]
   • 1992, Rudolf M[athias] Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, New York, N.Y.: Columbia University Press, →ISBN, page 7:

     The lobule margins, furthermore, are arched away from the lobe, with the consequence that (when fully inflated) the abaxial leaf surface forms the interior lining of the lobule.

2. Not in the axis. Applied to an embryo placed out of the axis of the seed.

• (on the back of an animal) dorsal
• eccentric

• adaxial

• Portuguese: abaxial