ABAXIAL
abaxial, dorsal
(adjective) 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”
Source: WordNet® 3.1
Etymology
Adjective
abaxial (not comparable)
(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 19th century.]
Not in the axis. Applied to an embryo placed out of the axis of the seed.
Synonyms
• (on the back of an animal): dorsal
• eccentric
Antonyms
• adaxial
Source: Wiktionary
Ab*ax"i*al, Ab*ax"ile, a. Etym: [L. ab + axis axle.] (Bot.)
Definition: Away from the axis or central line; eccentric. Balfour.
Source: Webster’s Unabridged Dictionary 1913 Edition