Definitions for "Mesozoic Era"
The intermediate era of the Phanerozoic Eon, following the Paleozoic Era and preceding the Cenozoic Era, and marked by the dominance of marine and terrestrial reptiles, and the appearance of birds, mammals, and flowering plants.
Division of geologic time scale that is defined as lasting from about 245 to 65 million years ago, consisting of the Triassic, Jurassic, and Cretaceous Periods.
The geological period from 225 to 65 million years ago.