plesiosaur

Thân thiện

A plesiosaur swims gracefully through a prehistoric ocean.

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.

Học thuật

Noun

1. extinct marine reptile with a small head on a long neck a short tail and four paddle-shaped limbs; of the Jurassic and Cretaceous

Từ đồng nghĩa

• plesiosaurus