Sylvian fissure
Concise Oxford English Dictionary © 2008 Oxford University Press:
Sylvian fissure /ˈsɪlvɪən/
▶noun Anatomy a large diagonal fissure which separates off the temporal lobe of the brain.
– origin C19: named after the 17th-cent. Flemish anatomist François de la Boë Sylvius.
'Sylvian fissure' also found in these Oxford entries:

