Definition of "fornix" [‖For•nix]

• An archlike anatomical structure or fold, such as the arched band of white matter located beneath the corpus callosum of the brain. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "HOLISTIC MEDICINE It receives afferents via inferior colliculi (inferior corpora quadrigemina) and medial geniculate bodies (part of thalamus) from COCHLEA, via olfactory tracts from OLFACTORY NEUROEPITHELIUM and via fornix [ "fornix" means arch] from MAMILLARY BODIES and probably from VESTIBULAR NUCLEUS on its posterior aspect where equilibrium sense is projected."
• "The vagina and its neighbors, including the following: vagina, hymen, urethral sponge, fornix (part of the vagina), cervix, os (part of the cervix), and pubococcygeus (PC) muscle."
• "In addition, the pyramidal cells send their axons into a large fiber tract (the fornix), which allows the pyramidal cells to be identified electrophysiologically by stimulating the axons in the fornix and backfiring the pyramidal cells."