eo-, eoso-, eos-

(Greek: dawn [east], daybreak; early; primarily used to signify, "early, primeval")

Eoanthropus (s) (noun), Eoanthropi (pl)
The name given to fossil organisms or a member of a genus represented by what was formerly believed to be the skull of a prehistoric human.
The transformation of prebiotic macromolecular systems into the first living organisms (eobionts).
1. An organism that lives on the body surface of another without feeding upon its host, as in many mosses and lichens.
2. The earliest known living organisms developed from some prebiotic macromolecular precursors.
A “dawn-thunder lizard”.from Greek, eos, “dawn” and bronte, “thunder”; Late Cretaceous. Named by Robert T. Bakker in 1998.
1. The epoch of geologic time, 55 million to 38 million years ago, during which the ancestors of many modern animals appeared.
2. Etymology: from Greek eos, "dawn" + Greek kainos, "new".
1. A zoogeographical division including Africa, South America, and Australasia.
2. Etymology: Greek eos, "dawn" plus gaia, "earth".
A small prehistoric horse that lived in North America.

It was dog-sized and had four toes on the front feet and three on the back feet.

One of the oldest stone tools used by humans, believed by some scientists to have formed naturally.
1. Relating to the earliest part of the Stone Age, during which time simple stone tools began to be used.
2. Referring to the early period of the Stone Age marked by the use of crudely chipped flint.
eophobia, eosophobia (s) (noun) (no plural)
An extreme fear of the dawn: After having spent many years in a very dark cell in prison, the inmate had euphobia, a horror of daylight and the sun rising!

In some cases eosophobia can cause a depression in a person because he or she wants to continue to sleep and not get up and face the activities of the day!

eoproligerous (adjective), more eoproligerous, most eoproligerous
Referring to the abundant production of something at dawn or very early in the day: June read in her biology book that some eoproligerous methods of germination take place only during day break.