Standard Lemma guide

inion

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

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1

noun

Meaning 1

A small protuberance on the external surface of the back of the skull near the neck; the external occipital protuberance.

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

the craniometric point that is the most prominent point at the back of the head (at the occipital protuberance)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: craniometric point

History

Etymology

From Ancient Greek ἰνίον (iníon, “occipital bone; back of the head”). Compare -ion (“anthropometric landmark”).

Across languages

Translations

10 source translations are retained for this English entry.

  • Arabic: قَمَحْدُوَة (qamaḥduwa) — small protuberance on the skull
  • Catalan: ini — small protuberance on the skull
  • Catalan: ínion — small protuberance on the skull
  • Chinese Mandarin: 枕外隆凸尖 — small protuberance on the skull
  • Czech: týlník — small protuberance on the skull
  • French: inion — small protuberance on the skull
  • Greek: ινίο (inío) — small protuberance on the skull
  • Ancient Greek: ἰνίον (iníon) — small protuberance on the skull
  • Latin: inion — small protuberance on the skull
  • Polish: inion — small protuberance on the skull