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| mid-Victorian |
a person living during the mid-Victorian era. [1/3 definitions] |
| Mississippian |
of, relating to, or designating the first coal-forming period of the Paleozoic Era, from approximately 350 million to 320 million years ago, when land areas increased and winged insects developed; Lower Carboniferous. [1/4 definitions] |
| Ordovician |
of, relating to, or designating the geological period between the Cambrian and Silurian of the Paleozoic Era, from approximately 500 million to 440 million years ago, when marine invertebrate animals were abundant. [1/2 definitions] |
| Paleozoic |
of, relating to, or designating the geological era between the Precambrian and Mesozoic, from approximately 600 million to 220 million years ago, when the first fishes, amphibians, reptiles, insects, and land plants appeared. [2 definitions] |
| Pennsylvanian |
of, relating to, or designating the second coal-forming period of the Paleozoic Era, from approximately 320 million to 280 million years ago, when swamp forests were abundant and large reptiles appeared; Upper Carboniferous. [1/4 definitions] |
| period |
an extended and indefinite span of time, as of an archaeological or historical era. [2/8 definitions] |
| Permian |
of, relating to, or designating the last geological period of the Paleozoic Era, from approximately 280 million to 220 million years ago, when reptiles became prominent, major mountain ranges such as the Appalachians formed, and great glaciers appeared in the Southern Hemisphere. [1/2 definitions] |
| plesiosaur |
an extinct marine reptile of the Mesozoic era having paddle-like limbs, a large flat body, and a short tail. |
| Precambrian |
of, relating to, or designating the earliest geological era, ending approximately 600 million years ago, when the earth's crust was formed and the first evidence of life appeared. [2 definitions] |
| pterosaur |
a flying reptile of the Mesozoic era characterized as having a birdlike beak and membranous wings supported by an exceptionally long fourth digit of each forelimb. |
| quaternary |
(cap.) of, relating to, or designating the latest geological period of the Cenozoic Era that includes the present and began approximately 1.8 million years ago, marked by widespread glaciers, the appearance of humans, and the development of human culture. [1/4 definitions] |
| Rhodesian man |
an extinct primitive man of the late Pleistocene Era, whose skeletal remains, found in southern Africa, are similar to modern man except for a large skull and low, massive brow ridges. |
| Silurian |
of, relating to, or designating the geological period between the Ordovician and Devonian of the Paleozoic Era, from approximately 440 million to 400 million years ago, when coral reefs began forming and land plants and air-breathing animals appeared. [1/2 definitions] |
| tertiary |
of, relating to, or designating the earlier of two periods of the Cenozoic Era, from approximately 65 million to 1.8 million years ago, when high mountains such as the Alps and Himalayas were formed and mammals became prominent. [1/5 definitions] |
| time |
(often pl.) the present or given era, esp. in terms of cultural or social conditions. [1/18 definitions] |
| Triassic |
of, relating to, or designating the first geological period of the Mesozoic Era, from approximately 220 million to 180 million years ago, when volcanic activity was prominent and many reptiles, including the dinosaurs, appeared. [1/2 definitions] |
| trilobite |
any of numerous extinct arthropods of the Paleozoic era that had laterally segmented external skeletons divided into three lengthwise lobes along the back. |
| vintage |
a class of objects produced during a certain era or year. [2/7 definitions] |
| -zoic |
of, relating to, or being a geological era characterized by (such) life. [1/2 definitions] |
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