- any chiefly terrestrial, herbivorous or carnivorous reptile of the extinct orders Saurischia and Ornithischia, from the Mesozoic Era, certain species of which are the largest known land animals.
- something that is unwieldy in size, anachronistically outmoded, or unable to adapt to change: The old steel mill was a dinosaur that cost the company millions to operate.
Origin of dinosaur
Examples from the Web for dinosaurs
Dinosaurs like Donald Sterling draw the ire of Americans, regardless of political affiliation or ideological tilt.How We Got to Ferguson—a Reading List
August 23, 2014
She can reorganize her own molecules, make computers with her brain, talk to dinosaurs.Scarlett Johansson Vs. the Faceless Men of Color
July 29, 2014
The right people are on their side, the bigots are the dinosaurs.Dear John, It Gets Better: A Letter to Travolta
July 24, 2014
As a paleontologist, he obviously understands the public fascination with dinosaurs and their remains.Stopping the Million-Dollar Fossil Thieves: Illegal Trade Meets World of Insatiable Research
June 11, 2014
I have just told my child that dinosaurs no longer live on earth.When An Adopted Child Won’t Attach
May 2, 2014
What matter if the herds of dinosaurs overrun us and destroy lives?
Dinosaurs roamed all over what is now called our middle west.
The bones of dinosaurs have been found in the Morrison of Colorado near Boulder.
The mouths of these Dinosaurs formed a kind of beak, sheathed in horn.Extinct Monsters
H. N. Hutchinson
Some bones of dinosaurs have also been found in the Connecticut Valley.Geology
William J. Miller
Word Origin and History for dinosaurs
- Any of various extinct reptiles of the orders Saurischia and Ornithischia that flourished during the Mesozoic Era. Dinosaurs were carnivorous or herbivorous, dwelled mostly on land, and varied from the size of a small dog to the largest land animals that ever lived. One group of dinosaurs evolved into birds. See more at ornithischian saurischian. See Note at bird.
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.