Standard Lemma guide

diapsid

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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  • UK: /daɪˈæpsɪd/
  • CMU ARPABET: D AY2 AE1 P S IH0 D Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

Any of very many reptiles, of the subclass Diapsida, that have a pair of openings in the skull behind each eye

Definition source: English Wiktionary via Wiktextract

Topics: biology, natural-sciences, zoology

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

reptile having a pair of openings in the skull behind each eye

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: diapsid reptile

Antonyms: anapsid

Broader terms: reptile, reptilian

Narrower terms: tuatara, Sphenodon punctatum, saurian, archosaur, archosaurian, archosaurian reptile, crocodilian reptile, crocodilian, snake, serpent, ophidian

History

Etymology

Clipping of taxonomic name Diapsida.

Across languages

Translations

2 source translations are retained for this English entry.

  • French: diapside — member of the Diapsida
  • Polish: diapsyd — member of the Diapsida