for'nix, gen. for^nicis

[L. arch, vault.] i. paired structure of the brain, made up chiefly of longitudinally directed white fibers, lying beneath the corpus callosum and just above the tela chorioidea of the third ventricle; the striae of the two sides are fused in the middle portion to form the triangular body which is also adherent to the corpus callosum above; the paired portion anterior to the body is called the column a (anterior pillar), the posterior paired portion the crus (posterior pillar). 2. vault-like space. f. conjunct i'vse [BNA], the space formed by the junction of the bulbar and palpebral portions of the conjunctiva, f. pharyn'gis [BNA], vault of the pharynx, the upper end of the nasopharynx forward to join the borders of the posterior nares. f. u'teri, one of the two spaces, anterior and posterior, between the cervix uteri and the vaginal wall. f. vagi'nn [BNA], the rece at the fundus of the vagina in front of (/. anterior) or behind (/. posterior) the cervix uteri. transverse' f.^ commis sur a hippocampi.