from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of or relating to a soft-bodied marine organism of the Precambrian Era, thought to be the earliest multicellular form of life.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of a geologic period within the Neoproterozoic era from about 620 to 542 million years ago.
- n. The Ediacaran period.
After the Ediacara Hills in southern Australia, where the first such fossils were found.(American Heritage® Dictionary of the English Language, Fourth Edition)