fornix
- n generally any arch shaped structure (but often it refers to the arched roof of an anatomical space)
- n an arched bundle of white fibers at the base of the brain by which the hippocampus of each hemisphere projects to the contralateral hippocampus and to the thalamus and mamillary bodies
- Fracture of the base of the skull, with laceration of the fornix cerebri (white fibers connecting the brain's hemispheres); contusion of the frontal and temporal lobes; severe .