Definition

Noun: 1. A primitive ornithischian dinosaur: Psittacosaur refers to a genus of small, herbivorous dinosaurs from the Early Cretaceous period. It is characterized by a parrot-like beak, long hind limbs, short forelimbs, and a very small, rudimentary bony frill at the back of the skull. It is considered a basal member of the ceratopsian group.

Usage

• The term psittacosaur is used specifically in paleontology and related scientific contexts to refer to this distinct genus of dinosaur.
• It functions as a countable noun (e.g., , ).

Examples

• The fossil discovery included a nearly complete skeleton of a psittacosaur.
• Psittacosaurs are believed to have been agile runners due to their long hind legs.
• Scientists study the psittacosaur to understand the early evolution of horned dinosaurs.

Advanced Usage

• The name is derived from Greek ( meaning "parrot" and meaning "lizard"), directly referencing its distinctive beak. It is sometimes informally called a "parrot-lizard."
• In scientific classification, it is the type genus of the family Psittacosauridae.

Variants and Related Words

• Psittacosaurus (n): The full, formal scientific name of the genus. The terms and are often used interchangeably in general contexts.
• Psittacosaurid (n/adj): (Noun) A member of the family Psittacosauridae. (Adjective) Relating to or characteristic of this family.

Synonyms

• Parrot-beaked dinosaur: A descriptive, non-scientific synonym highlighting its most distinctive feature.

Notes on Different Meanings

The word psittacosaur has only one specific meaning in modern English: it refers exclusively to this genus of dinosaur. It is not used in idiomatic expressions or phrasal verbs.

Noun

1. primitive dinosaur actually lacking horns and having only the beginning of a frill; long hind limbs and short forelimbs; may have been bipedal