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)


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