Paleozoic age

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• Paleozoic — era 542   251 million years ago Key events in the Paleozoic view • edit …   Wikipedia

• Age of Fishes — noun from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites • Syn: ↑Devonian, ↑Devonian period • Instance Hypernyms: ↑period, ↑geological period • Part Holonyms: ↑Paleozoic, ↑ …   Useful english dictionary

• Paleozoic — 1. adjective Of a geologic era within the Phanerozoic eon that comprises the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian periods from about 542 to 250 million years ago, from the age …   Wiktionary

• Paleozoic era — noun from 544 million to about 230 million years ago • Syn: ↑Paleozoic • Instance Hypernyms: ↑era, ↑geological era • Part Meronyms: ↑Permian, ↑Permian period, ↑ …   Useful english dictionary

• Secondary age — Secondary Sec ond*a*ry, a. [Cf. F. secondaire, L. secundaire. See {Second}, a.] 1. Succeeding next in order to the first; of second place, origin, rank, etc.; not primary; subordinate; not of the first order or rate. [1913 Webster] Wheresoever… …   The Collaborative International Dictionary of English

• Azoic age — Azoic A*zo ic, a. [Gr. a priv. + ? life, from ? to live.] Destitute of any vestige of organic life, or at least of animal life; anterior to the existence of animal life; formed when there was no animal life on the globe; as, the azoic. rocks.… …   The Collaborative International Dictionary of English

• Tommotian age — The Tommotian Age, named after the mollusc Tommotia , which began approx. 530 million years ago is an early part of the Cambrian period and lasted for only about 3 million years.PaleogeographyWorld climate during the Tommotian was mild; there was …   Wikipedia

• Asia — /ay zheuh, ay sheuh/, n. a continent bounded by Europe and the Arctic, Pacific, and Indian oceans. 2,896,700,000; ab. 16,000,000 sq. mi. (41,440,000 sq. km). * * * I Largest continent on Earth. It is bounded by the Arctic Ocean, the Pacific Ocean …   Universalium

• Australia — /aw strayl yeuh/, n. 1. a continent SE of Asia, between the Indian and the Pacific oceans. 18,438,824; 2,948,366 sq. mi. (7,636,270 sq. km). 2. Commonwealth of, a member of the Commonwealth of Nations, consisting of the federated states and… …   Universalium

• South America — South American. a continent in the S part of the Western Hemisphere. 271,000,000; ab. 6,900,000 sq. mi. (17,871,000 sq. km). * * * Continent, Western Hemisphere. The world s fourth largest continent, it is bounded by the Caribbean Sea to the… …   Universalium

• Africa — /af ri keuh/, n. 1. a continent S of Europe and between the Atlantic and Indian oceans. 551,000,000; ab. 11,700,000 sq. mi. (30,303,000 sq. km). adj. 2. African. * * * I Second largest continent on Earth. It is bounded by the Mediterranean Sea,… …   Universalium