Definitions

1. adjective

relating to or characteristic of protozoa, especially in their geological or paleontological context

“The protozoic fossils found in the rock formations provided valuable information about ancient ecosystems.”

2. noun

a geological or paleontological time period or era, especially in the early history of the earth, characterized by the presence of protozoa

“During the protozoic era, the earth’s oceans were home to a diverse array of single-celled organisms.”