(geology) Of a geologic era within the Phanerozoic eon that comprises the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian periods from about 542 to 250 million years ago, from the age of trilobites to that of reptiles.

(geology) The Paleozoic era.

A period that lasted from two and a half million years ago to 10,000 BC; the Old Stone Age.

Of or referring to the Old Stone Age (the Paleolithic period or Paleolithic age).

One who studies paleontology.

(anthropology) The scientific study of ancient human remains.

A scientist who specializes in paleoanthropology.

The study of old or ancient forms of writing. / Ancient scripts or forms of writing themselves, as uncial, scriptio continua, or methods of using papyrus scrolls. / (obsolete) Paleogeography.

Alternative letter-case form of Paleolithic / (informal) Extremely outdated.

a person skilled in paleography