Standard Lemma guide

diencephalon

noun · 2 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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /ˌdaɪənˈsɛfəlɒn/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • Received-Pronunciation: /ˌdaɪ̯.ənˈsɛfəlɒn/
  • US: /ˌdaɪ̯.ənˈsɛfəlɑn/

1

noun

Meaning 1

The region of the human brain, specifically the human forebrain, that includes the thalamus, the hypothalamus, the epithalamus, the prethalamus or subthalamus, and the pretectum.

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

2

noun

Meaning 2

the posterior division of the forebrain; connects the cerebral hemispheres with the mesencephalon

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: interbrain, betweenbrain, thalmencephalon

Antonyms: none provided

Broader terms: neural structure

History

Etymology

From New Latin diencephalon, from di-, prevocalic form of dia- + encephalon.

Across languages

Translations

31 source translations are retained for this English entry.

  • Azerbaijani: ara beyin — region of the human brain
  • Catalan: diencèfal — region of the human brain
  • Czech: mezimozek — region of the human brain
  • Danish: mellemhjernen — region of the human brain
  • Dutch: tussenhersen — region of the human brain
  • Estonian: vaheaju — region of the human brain
  • Finnish: väliaivot — region of the human brain
  • French: diencéphale — region of the human brain
  • German: Zwischenhirn — region of the human brain
  • German: Diencephalon — region of the human brain
  • German: Dienzephalon — region of the human brain
  • Greek: διεγκέφαλος (diegkéfalos) — region of the human brain
  • Hungarian: köztiagy — region of the human brain
  • Italian: diencefalo — region of the human brain
  • Japanese: 間脳 (kannō) — region of the human brain
  • Kazakh: аралық ми (aralyq mi) — region of the human brain
  • Northern Kurdish: demaxê navber — region of the human brain
  • Northern Kurdish: navberedemax — region of the human brain
  • Latvian: starpsmadzenes — region of the human brain
  • Lithuanian: tarpinės smegenys — region of the human brain
  • Persian: مغز میانجی (maġz miyânji) — region of the human brain
  • Polish: międzymózgowie — region of the human brain
  • Portuguese: diencéfalo — region of the human brain
  • Russian: промежу́точный мозг (promežútočnyj mozg) — region of the human brain
  • Sicilian: dincèfalu — region of the human brain
  • Spanish: diencéfalo — region of the human brain
  • Swedish: mellanhjärna — region of the human brain
  • Swedish: diencefalon — region of the human brain
  • Turkish: ara beyin — region of the human brain
  • Vietnamese: não trung gian — region of the human brain
  • Vietnamese: não giữa — region of the human brain