Definitions for cambrianˈkæm bri ən
This page provides all possible meanings and translations of the word cambrian
Random House Webster's College Dictionary
Cam•bri•anˈkæm bri ən(adj.)
noting or pertaining to a period of the Paleozoic Era, occurring from 570 million to 500 million years ago, when algae and marine invertebrates were the predominant form of life.
of or pertaining to Cambria; Welsh.
(n.)the Cambrian Period or System.
a native or inhabitant of Wales; Welshman or Welshwoman.
Origin of Cambrian:
1580–90; < ML Cambri(a) Wales, Latinization of MWelsh Cymry Wales, lit. Welshmen
Cambrian, Cambrian period(noun)
from 544 million to about 500 million years ago; marine invertebrates
Welshman, Welsh, Cambrian, Cymry(adj)
a native or resident of Wales
of or relating to or characteristic of Wales or its people or their language
"the Welsh coast"; "Welsh syntax"
the Cambrian period
a Welsh person
of a geologic period within the Paleozoic era; comprises lower, middle and Furongian epochs from about 542 to 490 million years ago
of, or relating to Wales
of or pertaining to Cambria or Wales
of or pertaining to the lowest subdivision of the rocks of the Silurian or Molluscan age; -- sometimes described as inferior to the Silurian. It is named from its development in Cambria or Wales. See the Diagram under Geology
a native of Cambria or Wales
the Cambrian formation
The Cambrian is the first geological period of the Paleozoic Era, lasting from 541.0 ± 1.0 to 485.4 ± 1.9 million years ago and is succeeded by the Ordovician. Its subdivisions, and indeed its base, are somewhat in flux. The period was established by Adam Sedgwick, who named it after Cambria, the Latin name for Wales, where Britain's Cambrian rocks are best exposed. The Cambrian is unique in its unusually high proportion of lagerstätten. These are sites of exceptional preservation, where 'soft' parts of organisms are preserved as well as their more resistant shells. This means that our understanding of the Cambrian biology surpasses that of some later periods. The Cambrian Period marked a profound change in life on Earth; prior to the Cambrian, living organisms on the whole were small, unicellular and simple. Complex, multicellular organisms gradually became more common in the millions of years immediately preceding the Cambrian, but it was not until this period that mineralized – hence readily fossilized – organisms became common. The rapid diversification of lifeforms in the Cambrian, known as the Cambrian explosion, produced the first representatives of many modern phyla, representing the evolutionary stems of modern groups of species, such as the molluscs and arthropods. While diverse life forms prospered in the oceans, the land was comparatively barren – with nothing more complex than a microbial soil crust and a few molluscs that emerged to browse on the microbial biofilm Most of the continents were probably dry and rocky due to a lack of vegetation. Shallow seas flanked the margins of several continents created during the breakup of the supercontinent Pannotia. The seas were relatively warm, and polar ice was absent for much of the period.
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