from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See Archean.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. Alternative form of Archaeozoic.
- adj. Alternative form of Archaeozoic.
from the GNU version of the Collaborative International Dictionary of English
- n. the time from 1.5 billion to 5 billion years ago, when the earth's crust was formed; the time when only unicellular organisms and the earliest forms of life are present. Same as Archaeozoic.
archeo- + -zoic (Wiktionary)