Meaning

noun (anatomy) a somewhat rounded subdivision of a bodily organ or part

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

originFrom Middle French lobe in early 16th century, from New Latin lobus (“a lobe”), from Ancient Greek λοβός (lobós, “the lobe of the ear or of the liver, the pod of a leguminous plant”).

Etymology from Wiktionary, CC BY-SA 3.0