Standard Lemma guide

ornithischian

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

Any of the order Ornithischia of typically herbivorous dinosaurs that have a pelvic structure similar to that of birds.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: bird-hipped dinosaur

Antonyms: none provided

2

noun

Meaning 2

herbivorous dinosaur with a pelvis like that of a bird

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: ornithischian dinosaur

Antonyms: none provided

Broader terms: dinosaur

Narrower terms: pisanosaur, pisanosaurus, staurikosaur, staurikosaurus, armored dinosaur, bone-headed dinosaur, ceratopsian, horned dinosaur, ornithopod, ornithopod dinosaur, hadrosaur, hadrosaurus, duck-billed dinosaur

History

Etymology

From the taxonomic name Ornithischia + -an.