from the GNU version of the Collaborative International Dictionary of English
- adj. Of or pertaining to rocks or strata older than the Paleozoic, in many of which the eozoön has been found.
from The Century Dictionary and Cyclopedia
- Of or pertaining to the oldest fossiliferous rocks, such as the Laurentian and Huronian of Canada, from the supposition that they contain the first or earliest traces of animal life; paleozoic.
Sorry, no etymologies found.