lobe
Pronunciation: /ləʊb/
noun
- a roundish and flattish projecting or hanging part of something, typically one of two or more such parts divided by a fissure: the leaf has a broad central lobe he pinched the lobe of his right earSee also earlobe.
- each of the parts of the cerebrum of the brain.

Origin:
late Middle English: via late Latin from Greek lobos 'lobe, pod'