• WordNet 3.6
    • n Precambrian the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago
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Century Dictionary and Cyclopedia
    • Precambrian Noting rocks older than the Cambrian or first fossiliferous strata: used by many writers as preferable to azoic, eozoic, archæan, primitive, etc, because it is non-committal.
    • n Precambrian Precambrian strata.
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In news:

Sphaerica's traces are spitting image of the old, Precambrian fossils.
The Goodyear Eagle "Gatorback," the Pirelli P7, and reaching back to the Precambrian era of performance radials, the Phoenix Stahflex 3011.
To go back further in time, eastern Ohio may have been at the edge of what we call North America about 1 billion years ago, during a geologic time known as the Precambrian Era.
Rundqvist, Russian Academy of Sciences, Institute of Precambrian Geology and Geochronology, nab.

In science:

The lunar orbit in the late precambrian and the elatina sandstone laminae.
A selection of papers with some relevance to the investigation of the Sun-Climate link: Papers on Data, Methods and Commentary
Taking the two papers together, the authors use nonintrusive and non-destructive Raman imagery and confocal laser scanning microscopy of thin slices of precambrian fossils in cherts.
Astrophysics in 2006
The domal uplifts that exposed this island of Precambrian rock, 1.9-2.5 billion years old, occurred 530 and 65 million years ago, the last after the great inland sea retreated.
Reference Design Project Book: NUSEL-Homestake