fornix Meaning, Definition & Usage

  1. noun generally any arch shaped structure (but often it refers to the arched roof of an anatomical space)
  2. noun 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
    trigonum cerebrale.

WordNet

For"nix noun
Etymology
L., an arch.
Wordforms
plural Fornices
Definitions
  1. (Anat.) (a) An arch or fold; as, the fornix, or vault, of the cranium; the fornix, or reflection, of the conjuctiva. (b) Esp., two longitudinal bands of white nervous tissue beneath the lateral ventricles of the brain.

Webster 1913