The meaning of DINOSAUR is any of a group (Dinosauria) of extinct, often very large, carnivorous or herbivorous archosaurian reptiles that have the hind limbs extending directly beneath the …

DINOSAUR definition: 1. a type of reptile that became extinct about 65,000,000 years ago. There were many different…. Learn more.

Birds are avian dinosaurs, and in phylogenetic taxonomy their over 11,000 extant species are included in the group Dinosauria.. Dinosaurs are a diverse group of reptiles [note 1] of the …

2025年1月18日 · Dinosaur, the common name given to a group of reptiles, often very large, that first appeared roughly 245 million years ago and thrived worldwide for nearly 180 million years. …

2022年7月8日 · A more handy general definition would go something like this: Dinosaurs are extinct animals with upright limbs that lived on land during the Mesozoic Era (252 to 66 million …

any of various extinct, mostly land-dwelling, four-limbed saurischian or ornithischian reptiles of the Mesozoic Era, including some c. 30 m (98.4 ft) long: the flesh-eaters usually walked on their …

All are gone—at least in their original form, although it is thought they simply evolved into other, present-day animals. The word dinosaur is often used for someone who is old-fashioned or …

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 …

1. any herbivorous or carnivorous reptile of the extinct orders Saurischia and Ornithischia, of the Mesozoic Era: some were the largest known land animals. 2. something that is unwieldy, …

DINOSAUR definition: a very large animal that used to live millions of years ago. Learn more.