'Lobe' definitions:

Definition of 'lobe'

From: WordNet
noun
(anatomy) a somewhat rounded subdivision of a bodily organ or part; "ear lobe"
noun
(botany) a part into which a leaf is divided
noun
The enhanced response of an antenna in a given direction as indicated by a loop in its radiation pattern
noun
A rounded projection that is part of a larger structure

Definition of 'Lobe'

From: GCIDE
  • Lobe \Lobe\ (l[=o]b), n. [F. lobe, Gr. lobo`s.] Any projection or division, especially one of a somewhat rounded form; as: (a) (Bot.) A rounded projection or division of a leaf. --Gray. (b) (Zool.) 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. [1913 Webster]
  • Lobe of the ear, the soft, fleshy prominence in which the human ear terminates below, also called the earlobe. See. Illust. of Ear. [1913 Webster +PJC]

Synonyms of 'lobe'

From: Moby Thesaurus