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eutherian

[yoo-theer-ee-uh n]
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adjective
  1. belonging or pertaining to the group Eutheria, comprising the placental mammals.
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noun
  1. a eutherian animal.
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Origin of eutherian

1875–80; < New Latin Eutheri(a) (< Greek eu- eu- + thēría, plural of thēríon wild beast) + -an
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for eutherian

eutherian

adjective
  1. of, relating to, or belonging to the Eutheria, a subclass of mammals all of which have a placenta and reach an advanced state of development before birth. The group includes all mammals except monotremes and marsupials
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noun
  1. any eutherian mammal
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Word Origin

C19: from New Latin Euthēria, from Greek eu- + thēria, plural of thērion beast
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012