Breadcrumb Home > Thesaurus > E Synonyms of eutherian Find synonyms for: Noun 1. placental, placental mammal, eutherian, eutherian mammal, mammal, mammalian usage: mammals having a placenta; all mammals except monotremes and marsupials Adjective 1. eutherian usage: of or relating to or belonging to the subclass Eutheria; "eutherian mammals" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of eutherian (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: anomie Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language