- fornix - generally any arch shaped structure (but often it refers to the arched roof of an anatomical space)
--1 is a kind of body part
- fornix, trigonum cerebrale - 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
--2 is a kind of fiber bundle, fibre bundle, fascicle, fasciculus
--2 is a part of limbic system, visceral brain, limbic brain
--2 has parts: carina fornicis - fornix, trigonum cerebrale - 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