[yoo-theer-ee-uh n]


belonging or pertaining to the group Eutheria, comprising the placental mammals.


a eutherian animal.

Nearby words

  1. euthanasia,
  2. euthanise,
  3. euthanize,
  4. euthenics,
  5. euthenist,
  6. euthermic,
  7. euthymia,
  8. euthyroid,
  9. eutocia,
  10. eutonic

Origin of eutherian

1875–80; < New Latin Eutheri(a) (< Greek eu- eu- + thēría, plural of thēríon wild beast) + -an Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for eutherian

British Dictionary definitions for eutherian



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


any eutherian mammal

Word Origin for eutherian

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