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dinosaurs

Cultural  
  1. Reptiles, now extinct, that were the dominant life form on Earth for many millions of years. The name dinosaur comes from the Greek words for “monstrous lizard.” Dinosaurs became extinct suddenly, about sixty-five million years ago. Scientists now believe that their extinction was caused by the impact of a large asteroid on the Earth.


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Some dinosaurs were very large and had small brains — factors that may in part have led to their extinction. The term is often used to refer to something or someone that is antiquated and unable to adapt to change: “The old cavalry generals couldn't adjust to the use of tanks — they became dinosaurs.”

Some scientists believe that modern birds are the descendants of dinosaurs.

Commonly known dinosaurs include Tyrannosaurus rex, Brontosaurus, Stegosaurus, and Triceratops.

Example Sentences

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The American Museum of Natural History gave fans the chance to rub shoulders with dinosaurs while watching Messi, 39, fail to steer Argentina to its fourth World Cup.

From Barron's Jul. 19, 2026

The asteroid strike that created it is widely associated with the extinction event that wiped out all nonavian dinosaurs and many other species.

From Science Daily Jul. 18, 2026

The U.S. is the only country where fossils excavated on private land can be sold, prompting a long-running debate about whether dinosaurs should be privately owned.

From The Wall Street Journal Jul. 14, 2026

Jeff Goldblum and Martin Ferrero also appeared alongside Neill, Dern and Attenborough - as well as lots of dinosaurs.

From BBC Jul. 13, 2026

But then I remember how terrified I was when Ma accidentally took me to the land of dinosaurs.

From "Dragons in a Bag" by Zetta Elliott

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