paleontology
nounThe study of the forms of life existing in prehistoric or geologic times, as represented by the fossils of plants, animals, and other organisms.
nounThe science of the former life of the globe; the study of the life of former geologic periods; that branch of biology which treats of fossil organisms, and especially of fossil animals; paleozoölogy and paleobotany. Also called
The science which treats of the ancient life of the earth, or of fossils which are the remains of such life.
nounthe earth science that studies fossil organisms and related remains