Standard Lemma guide

fornix

noun · 5 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • /ˈfɔː(ɹ).nɪks/

1

noun

Meaning 1

An archlike or vaulted structure or fold:

The junction where the conjunctiva lining the eyelid meets the conjunctiva overlying the sclera.

Definition source: English Wiktionary via Wiktextract

Topics: anatomy, medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

An archlike or vaulted structure or fold:

A triangular area of white matter in the mammalian brain beneath the corpus callosum and between the hippocampus and the hypothalamus.

Definition source: English Wiktionary via Wiktextract

Topics: anatomy, medicine, neuroanatomy, neurology, neuroscience, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

An archlike or vaulted structure or fold:

The vaulted upper part of the vagina surrounding the uterine cervix.

Definition source: English Wiktionary via Wiktextract

Topics: anatomy, medicine, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

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

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: trigonum cerebrale

Antonyms: none provided

Broader terms: fiber bundle, fibre bundle, fascicle, fasciculus

5

noun

Meaning 5

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

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: body part

History

Etymology

Borrowing from Latin fornix (“an arch, vault”).

Across languages

Translations

11 source translations are retained for this English entry.

  • Catalan: fòrnix — archlike or vaulted structure or fold
  • Chinese Mandarin: 穹窿 — archlike or vaulted structure or fold
  • Finnish: holvi — archlike or vaulted structure or fold
  • Finnish: pohjukka — archlike or vaulted structure or fold
  • Spanish: fórnix — archlike or vaulted structure or fold
  • Catalan: fòrnix — brain part
  • Chinese Mandarin: 穹窿 — brain part
  • Esperanto: fornikso — brain part
  • Finnish: aivokaari — brain part
  • Polish: sklepienie — brain part
  • Spanish: fórnix — brain part