Noun

(en noun)

Any projection or division, especially one of a somewhat rounded form.

(anatomy) A division of the brain.

*{{quote-magazine, date=2013-08-03, volume=408, issue=8847, magazine=(The Economist)

, title= The machine of a new soul , passage=The yawning gap in neuroscientists’ understanding of their topic is in the intermediate scale of the brain’s anatomy. Science has a passable knowledge of how individual nerve cells, known as neurons, work. It also knows which visible lobes' and ganglia of the brain do what. But how the neurons are organised in these ' lobes and ganglia remains obscure.}}

Noun

(en noun)

(architecture) a symmetrical shape which forms the overall outline of eight partially-overlapping circles of the same diameter.

(heraldiccharge) A stylized flower or leaf with eight lobes; an octofoil.