Miocene(redirected from 13 million years ago)
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Of, relating to, or being the epoch of geologic time from about 23 to 5.3 million years ago, the fourth epoch of the Tertiary Period. It is characterized by the spread of grasses and grazing mammals. See Table at geologic time.
The Miocene Epoch.
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.
(Geological Science) of, denoting, or formed in the fourth epoch of the Tertiary period, between the Oligocene and Pliocene epochs, which lasted for 19 million years
(Geological Science) the Miocene this epoch or rock series
[C19: from Greek meiōn less + -cene]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
1. noting or pertaining to an epoch of the Tertiary Period, occurring from 25 million to 10 million years ago, when grazing mammals became widespread.n.
2. the Miocene Epoch or Series.
[1832; mio- (< Greek meíōn less) + -cene]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
The fourth epoch of the Tertiary Period, from about 24 to 5 million years ago, characterized by the development of grasses and grazing mammals. See Chart at geologic time.
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.
See also related terms for recent.
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