The phrase "giant dinosaurs" refers to large and enormous reptiles that lived a long time ago on Earth and were much bigger than any animals we have today. Full definition
From eggs like these, giant dinosaurs up to 20 metres in length could be produced. (newscientist.com)
It may have been the golden age of the most giant dinosaurs, but snakes in that era were no more than a few feet. (petbusiness.com)
The Good Dinosaur asks the generations - old question: What if the asteroid that forever changed life on Earth missed the planet completely and giant dinosaurs never became extinct? (metacritic.com)