geologic time

geologic time

geologic time

n.

The period of time covering the physical formation and development of Earth, especially the period prior to human history.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ge′olog′ic time′

n.

the succession of eras, periods, and epochs as considered in historical geology.

[1860–65]

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

ge·o·log·ic time

(jē′ə-lŏj′ĭk)

The period of time covering the formation and development of the Earth, from about 4.6 billion years ago to today.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Thesaurus

Noun

1.

geologic time - the time of the physical formation and development of the earth (especially prior to human history) geological time time - the continuum of experience in which events pass from the future through the present to the past eon, aeon - the longest division of geological time geological period, period - a unit of geological time during which a system of rocks formed; "ganoid fishes swarmed during the earlier geological periods" geological era, era - a major division of geological time; an era is usually divided into two or more periods epoch - a unit of geological time that is a subdivision of a period and is itself divided into ages

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