dinosaurs

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.

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

The park, which remains open for business as usual while a new owner is sought, has 36 rides and activities along with more than large-scale 90 dinosaurs - some fibreglass, some animatronic.

From BBC

One is a short loop designed primarily for young children, which will feature a little more than half of the dinosaurs, while the other is a full jaunt around the garden.

From Los Angeles Times

"It is one of the strangest dinosaurs ever discovered," said Prof Butler.

From BBC

"Boys like either dinosaurs or airplanes," he said.

From BBC

Scientists have discovered a new species of pterosaur – a flying reptile that soared above the dinosaurs more than 200 million years ago.

From BBC