plesiosaur
Definition
Noun: 1. An extinct marine reptile: A type of large prehistoric reptile that lived in the ocean. It is characterized by a very long neck, a small head, a short tail, and four large, paddle-shaped limbs (flippers) used for swimming. Plesiosaurs lived during the Mesozoic Era, specifically the Jurassic and Cretaceous periods.
Usage Examples
- Noun:
- The fossil of a plesiosaur was discovered in the ancient seabed.
- Scientists study the bone structure of the plesiosaur to understand how it swam.
- The long neck of the plesiosaur may have helped it catch fish.
Advanced Usage
- The term plesiosaur is often used in scientific and popular contexts to describe the entire order , which includes both long-necked forms (plesiosaurs proper) and short-necked, large-headed forms (pliosaurs).
- The exhibit featured skeletons from various groups within the plesiosaur order.
Variants and Related Words
- Plesiosauria (n): The scientific order or group to which plesiosaurs belong.
- Plesiosauroid (adj/n): Resembling or related to a plesiosaur.
- Pliosaur (n): A related type of marine reptile within the same order, characterized by a shorter neck and a much larger head.
Synonyms
- Marine reptile: A general term for reptiles that lived in the ocean.
- Sea dragon: An informal, descriptive term sometimes used in popular media.
Related Phrases
- Plesiosaur fossil: The preserved remains or impression of a plesiosaur.
- The museum acquired a remarkably complete plesiosaur fossil.
Noun
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extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous
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