Sentence:  The lobule margins, furthermore, are arched away from the lobe, with the consequence that (when fully inflated) the <WSD>abaxial</WSD> leaf surface forms the interior lining of the lobule. 
Meaning of the word marked with <WSD> tags:  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.)<ref>(page=2)</ref>