Lobe

·noun A rounded projection or division of a leaf.

II. Lobe ·noun The projecting part of a cam wheel or of a non-circular gear wheel.

III. Lobe ·noun Any projection or division, especially one of a somewhat rounded form.

IV. Lobe ·noun A membranous flap on the sides of the toes of certain birds, as the coot.

V. Lobe ·noun A round projecting part of an organ, as of the liver, lungs, brain, ·etc. ·see ·Illust. of Brain.