abaxial

/æbˈæksiəl/
adjective
  1. Located away from the axis or central line of a plant or body part; the side facing away from the stem or center.
    • The abaxial surface of the leaf is usually lighter in color.
    • In ferns, the spores are often found on the abaxial leaf surface.
    • Botanists examined the abaxial side of the petal for tiny hairs.
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What does "abaxial" mean? | whatsthatwordmean | whatsthatwordmean