fornix

for·nix

F0267900 (fôr′nĭks)n. pl. for·ni·ces (-nĭ-sēz′) An archlike anatomical structure or fold, such as the arched band of white matter beneath the corpus callosum of the brain.

[Latin, arch, vault; see g^wher- in Indo-European roots.]

fornix

(ˈfɔːnɪks) n, pl -nices (-nɪˌsiːz) (Anatomy) anatomy any archlike structure, esp the arched band of white fibres at the base of the brain[C17: from Latin; see fornicate²] ˈfornical adj

for•nix

(ˈfɔr nɪks)

n., pl. -ni•ces (-nəˌsiz) any of various arched or vaulted anatomical structures, as the triangular bands of white fibers beneath the corpus callosum of the mammalian brain. [1675–85; < Latin: vault, arch] for′ni•cal, adj.

fornix

- The upper shell of an oyster.See also related terms for oyster.

Thesaurus

Noun	1.	fornix - generally any arch shaped structure (but often it refers to the arched roof of an anatomical space)body part - any part of an organism such as an organ or extremity
	2.	fornix - 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 bodiestrigonum cerebralecarina fornicis - ridge on the lower surface of the fornix of the brainfasciculus, fiber bundle, fibre bundle, fascicle - a bundle of fibers (especially nerve fibers)limbic brain, limbic system, visceral brain - a system of functionally related neural structures in the brain that are involved in emotional behavior

Translations

fornix

[for´niks] (pl. for´nices) (L.) an anatomical archlike structure.fornix of conjunctiva conjunctival cul-de-sac.

for·nix

, gen.

for·ni·cis

, pl.

for·ni·ces

(fōr'niks, -ni-sis, -ni-sēz), [TA] Do not confuse this word with pharynx.1. In general, an arch-shaped structure; often the arch-shaped roof (or roof portion) of an anatomic space. 2. The compact, white fiber bundle by which the hippocampus of each cerebral hemisphere projects to the contralateral hippocampus and to the septum, anterior nucleus of the thalamus, and mammillary body. Arising from pyramidal cells of the Ammon horn, the fibers of the fornix form the alveus hippocampi and the fimbria hippocampi, and in their further course compose, sequentially, the commissure of the fornix [TA], also called the hippocampal commissure [TA] (commissura hippocampi [TA]), the crus of fornix [TA] (crus fornicis [TA]), the body of fornix [TA] (corpus fornicis [TA]), and the column of fornix [TA] (columna fornicis [TA]), which divides into a smaller portion of precommissural fibers [TA] that pass anterior to the anterior commissure to the septal area and a larger portion of postcommissural fibers [TA] that pass posterior to the anterior commissure to end mainly in the mammillary nuclei and to a lesser extent in the anterior thalamic nucleus. Synonym(s): trigonum cerebrale Synonym(s): cerebral trigone [L. arch, vault]

fornix

(fôr′nĭks)n. pl. for·nices (-nĭ-sēz′) An archlike anatomical structure or fold, such as the arched band of white matter beneath the corpus callosum of the brain.

for·nix

, gen. fornicis, pl. fornices (fōr'niks, -ni-sis, -sēz) 1. [TA] In general, an arch-shaped structure; often the arch-shaped roof (or roof portion) of an anatomic space. 2. The compact, white fiber bundle by which the hippocampus of each cerebral hemisphere projects to the contralateral hippocampus and to the septum, anterior nucleus of the thalamus, and mammillary body. Arising from pyramidal cells of Ammon's horn, the fibers of the fornix form the alveus hippocampi and the fimbria hippocampi, and in their further course compose, sequentially, the commissure of the fornix, also called the hippocampal commissure (commissura hippocampi [TA]), the crus of fornix (crus fornicis [TA]), the body of fornix (corpus fornicis [TA]), and the column of fornix (columna fornicis [TA]), which divides into a smaller portion of precommissural fibers that pass anterior to the anterior commissure to the septal area and a larger portion of postcommissural fibers that pass posterior to the anterior commissure to end mainly in the mammillary nuclei and to a lesser extent in the anterior thalamic nucleus. [L. arch, vault]

fornix

An arch, especially one of the pair of arch-like bands of white fibres lying under the corpus callosum of the brain, or the space between the upper walls of the vagina and the neck of the womb.

conjunctiva

A thin transparent mucous membrane lining the posterior surface of the eyelids from the eyelid margin and reflected forward onto the anterior part of the eyeball where it merges with the corneal epithelium at the limbus. It thus forms a sac, the conjunctival sac, which is open at the palpebral fissure and closed when the eyes are shut. The depths of the unextended sac are 14-16 mm superiorly and 9-11 mm inferiorly. The conjunctiva is divided into three portions: (1) The portion that lines the posterior surface of the eyelids is called the palpebral conjunctiva. It is itself composed of the marginal conjunctiva, which extends from the eyelid margin to the tarsal conjunctiva; the tarsal conjunctiva, which extends from the marginal conjunctiva to the orbital conjunctiva; and the orbital conjunctiva, which extends from the tarsal conjunctiva to the fornix. (2) That lining the eyeball is the bulbar conjunctiva. It is itself composed of the limbal conjunctiva, which is fused with the episclera at the limbus and the scleral conjunctiva, which extends from the limbal conjunctiva to the fornix. (3) The intermediate part forming the bottom of the conjunctival sac, unattached to the eyelids or the eyeball and joining the bulbar and the palpebral portion is called the fornix (conjunctival fold, cul-de-sac). See dyskeratosis; lid eversion; conjunctival gland; Krause's end bulbs; subtarsal sulcus.

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Synonyms for fornix

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

Related Words

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

Synonyms

Related Words