[adj] (biology) 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"
[adj] situated away from the axis of any body or part
\Ab*ax"i*al\ ([a^]b*[a^]ks"[i^]*al), Abaxile \Ab*ax"ile\ ([a^]b*[a^]ks"[i^]l),a. [L. ab + axis axle.] (Bot.) Away from the axis or central line; eccentric. --Balfour.