from the GNU version of the Collaborative International Dictionary of English
- n. a deep cerebral fissure separating the frontal from the temporal lobe. See Illust. under Brain.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the deepest and most prominent of the cortical fissures; separates the frontal lobes and temporal lobes in both hemispheres
Sorry, no etymologies found.