What does "precambrian" mean?

Relating to the time and geology dated before the Phanerozoic

How do you pronounce "precambrian"?

Pronounced //priːˈkam.bɹɪ.ən//.

Common synonyms include: ancient, archaic, early earth time, period, pre phanerozoic time, prehistoric era.

/priːˈkam.bɹɪ.ən/ adj, name, slang

adj, name, slang ·Moderate ·College level

Adjective

1
Relating to the time and geology dated before the Phanerozoic informal, not-comparable
"When you look at a Precambrian trilobite in the lobby of a New York bank, it is difficult to speculate about its primeval environment."

Proper Noun

1
The Precambrian supereon; spanning from the formation of the Earth around 4.6 billion years ago to the emergence of hard-shelled creatures 541 million years ago.

"When you look at a Precambrian trilobite in the lobby of a New York bank, it is difficult to speculate about its primeval environment."

From pre- + Cambrian.