ab·ax·i·al /(ˌ)æˈbæksiəl/ 形容詞
  離軸的
  Ab·ax·i·al Ab·ax·ile a.  Bot. Away from the axis or central line; eccentric.
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  abaxial
       adj : 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" [syn: dorsal] [ant: adaxial]