Dinosaurs and fossils

any of numerous extinct terrestrial reptiles of the Mesozoic era

the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil

any cold-blooded vertebrate of the class Reptilia including tortoises, turtles, snakes, lizards, alligators, crocodiles, and extinct forms

the hard structure (bones and cartilages) that provides a frame for the body of an animal

The hard, calcified tissue of the skeleton of vertebrate animals, consisting very largely of calcic carbonate, calcic phosphate, and gelatine; a…

Extinguished; put out; quenched; as, a fire, a light, or a lamp, is extinct; an extinct volcano.

Of the age of the middle Mesozoic, including, as divided in England and Europe, the Lias, Oolite, and Wealden; -- named from certain rocks of th…

Having the qualities of chalk; abounding with chalk; chalky; as, cretaceous rocks and formations. See Chalk.

An organism that hunts and feeds on other organisms

any animal that feeds chiefly on grass and other plants; "horses are herbivores"; "the sauropod dinosaurs were apparently herbivores"

a bird's foot

toothlike structure in invertebrates found in the mouth or alimentary canal or on a shell

To hollow out; to form cavity or hole in; to make hollow by cutting, scooping, or digging; as, to excavate a ball; to excavate the earth.

A repository or a collection of natural, scientific, or literary curiosities, or of works of art.