Definition

1. Noun:
   • An extinct marine reptile: An "ichthyosaurus" is a type of extinct marine reptile that lived during the Mesozoic Era, particularly common in the Jurassic period. It had a streamlined, fish-like body, a long snout, and large eyes, adapted for fast swimming and hunting in ancient oceans.

Examples of Usage

• Noun:
  • The museum's fossil collection includes a remarkably complete skeleton of an ichthyosaurus.
  • Scientists study the vertebrae of the ichthyosaurus to understand its locomotion.

Advanced Usage

• In paleontological context: The term is used specifically to refer to members of the genus within the larger order Ichthyosauria.
  • The newly discovered specimen may represent a new species of ichthyosaurus.

Variants and Related Words

• Ichthyosaur (n): The broader order or group to which ichthyosaurs belong. Often used interchangeably in general contexts.
  • Ichthyosaurs were dominant marine predators for millions of years.
• Ichthyosaurian (adj): Relating to or characteristic of ichthyosaurs.
  • The rock layer contained ichthyosaurian remains.

Synonyms

• Marine reptile: A general term for reptiles that lived in the sea, such as plesiosaurs and mosasaurs (though these are different groups).
• Fish lizard: A direct translation of the Greek roots of the word ("ichthys" meaning fish, "sauros" meaning lizard).

Related Phrases

• Ichthyosaur fossil: The preserved remains or impression of an ichthyosaur.
  • The coastline is famous for its exposed ichthyosaur fossils.

Noun

1. ichthyosaurs of the Jurassic