geological era

a major division of geological time; an era is usually divided into two or more periods
Syn: ↑era
Hypernyms: ↑geological time, ↑geologic time
Instance Hyponyms:
Part Holonyms: ↑eon, ↑aeon
Part Meronyms: ↑period, ↑geological period

Useful english dictionary. 2012.

Look at other dictionaries:

  • geological period — noun a unit of geological time during which a system of rocks formed ganoid fishes swarmed during the earlier geological periods • Syn: ↑period • Hypernyms: ↑geological time, ↑geologic time • Hyponyms: ↑ice age, ↑ …   Useful english dictionary

  • geological time — noun the time of the physical formation and development of the earth (especially prior to human history) • Syn: ↑geologic time • Hypernyms: ↑time • Hyponyms: ↑eon, ↑aeon, ↑period, ↑ …   Useful english dictionary

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  • era — /ear euh, er euh/, n. 1. a period of time marked by distinctive character, events, etc.: The use of steam for power marked the beginning of an era. 2. the period of time to which anything belongs or is to be assigned: She was born in the era of… …   Universalium

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  • Geological history of Earth — impacting the Earth in a glancing blow. [cite journal | last = R. Canup and E. Asphaug | title = Origin of the Moon in a giant impact near the end of the Earth s formation | journal = Nature | volume = 412 | pages = 708–712 | date = 2001 | url =… …   Wikipedia

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  • Era Mesozoica — Eón[1] Era Millones años Fanerozoico Cenozoico 65,5 ±0,3 Mesozoico 251,0 ±0,4 Paleozoico 542,0 ±1,0 …   Wikipedia Español

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