from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A rounded projection, especially a rounded, projecting anatomical part: the lobe of an ear.
  • n. A subdivision of a bodily organ or part bounded by fissures, connective tissue, or other structural boundaries.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any projection or division, especially one of a somewhat rounded form.
  • n. A division of the brain.

from the GNU version of the Collaborative International Dictionary of English

  • n. A rounded projection or division of a leaf.
  • n. A membranous flap on the sides of the toes of certain birds, as the coot.
  • n. A round projecting part of an organ, as of the liver, lungs, brain, etc. See Illust. of brain.
  • n. The projecting part of a cam wheel or of a non-circular gear wheel.

from The Century Dictionary and Cyclopedia

  • n. A rounded and more or less globular projection or part.
  • n. In botany, a rounded projection or division of a leaf, fruit, or other organ of a plant.
  • n. In zoology, a projection or part which is imperfectly separated from another part: as, the lobes of the maxillæ in insects.
  • n. In machinery, the larger or more prominent part of a cam-wheel.
  • n. The lobus semilunaris inferior together with the slender lobe.
  • n. See the adjectives.
  • n. In the septate cephalopoda like Nautilus and the ammonites, any division of the septal suture which makes a convex curve toward the apex: contrasted with saddle, which is a curvature toward the aperture.
  • n. In the trilobites, one of the divisions of the glabella; a glabellar lobe.
  • n. In geology, a projection from a glacier, like a peninsula: especially used of the continental ice-sheet of the glacial epoch. see ice-lobe.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a rounded projection that is part of a larger structure
  • n. (anatomy) a somewhat rounded subdivision of a bodily organ or part
  • n. the enhanced response of an antenna in a given direction as indicated by a loop in its radiation pattern
  • n. (botany) a part into which a leaf is divided


Middle English, from Old French, from Late Latin lobus, hull, pod, from Greek lobos, lobe, pod.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From French lobe, from New Latin lobus ("a lobe"), from Ancient Greek λοβός (lobos, "the lobe of the ear or of the liver, the pod of a leguminous plant"). (Wiktionary)



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  • (n): in figure skating, a semicircle scribed on the ice by by the skater's blade.

    January 16, 2009