| EO | from 40 million to 58 million years ago |
|---|---|
| EO | from 40 million to 58 million years ago |
| EO | earliest horse |
| EO | a member of one of the four divisions of the prehistoric Greeks |
| EO | the dialect of Ancient Greek spoken in Thessaly and Boeotia and Aeolis |
| EO | a crude stone artifact (as a chipped flint) |
| EO | of or relating to the earliest period of the Stone Age (characterized by the use of eoliths) |
| EO | the earliest part of the Stone Age marked by the earliest signs of human culture |
| EO | (physics) having properties with different values along different axes |
| EO | (in Gnosticism) a divine power or nature emanating from the Supreme Being and playing various roles in the operation of the universe |
| EO | an immeasurably long period of time |
| EO | the longest division of geological time |