Source : Webster's Revised Unabridged Dictionary (1913)

Lobe \Lobe\, n. [F. lobe, Gr. ?.]
   Any projection or division, especially one of a somewhat
   rounded form; as:
   (a) (Bot.) A rounded projection or division of a leaf.
       --Gray.
   (b) (Zo["o]l.) A membranous flap on the sides of the toes of
       certain birds, as the coot.
   (c) (Anat.) A round projecting part of an organ, as of the
       liver, lungs, brain, etc. See Illust. of {Brain}.
   (b) (Mach.) The projecting part of a cam wheel or of a
       non-circular gear wheel.

   {Lobe of the ear}, the soft, fleshy prominence in which the
      human ear terminates below. See. Illust. of {Ear}.