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Any of various mammals of the infraclass Eutheria, including all of the species, such as primates, carnivores, whales, ruminants, bats, and rodents, in which the female bears live young that are nourished before birth by means of a complex placenta. Also called placental mammal.

[From New Latin Euthēria, infraclass name : Greek eu-, eu- + Greek thēria, pl. of thērion, wild animal; see treacle.]

eu·ther′i·an adj.
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.


(Zoology) 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
(Zoology) any eutherian mammal
[C19: from New Latin Euthēria, from Greek eu- + thēria, plural of thērion beast]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(yuˈθɪər i ən)

1. belonging or pertaining to the group Eutheria, comprising the placental mammals.
2. a eutherian animal.
[1875–80; < New Latin Eutheri(a) (< Greek eu- eu- + thēría, pl. of thēríon wild beast) + -an1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.eutherian - mammals having a placentaeutherian - mammals having a placenta; all mammals except monotremes and marsupials
mammal, mammalian - any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk
Eutheria, subclass Eutheria - all mammals except monotremes and marsupials
farm animal, livestock, stock - any animals kept for use or profit
bull - mature male of various mammals of which the female is called `cow'; e.g. whales or elephants or especially cattle
cow - mature female of mammals of which the male is called `bull'
yearling - an animal in its second year
buck - mature male of various mammals (especially deer or antelope)
doe - mature female of mammals of which the male is called `buck'
insectivore - small insect-eating mainly nocturnal terrestrial or fossorial mammals
aquatic mammal - whales and dolphins; manatees and dugongs; walruses; seals
carnivore - a terrestrial or aquatic flesh-eating mammal; "terrestrial carnivores have four or five clawed digits on each limb"
Fissipedia - in some classifications considered a suborder of Carnivora
aardvark, Orycteropus afer, ant bear, anteater - nocturnal burrowing mammal of the grasslands of Africa that feeds on termites; sole extant representative of the order Tubulidentata
bat, chiropteran - nocturnal mouselike mammal with forelimbs modified to form membranous wings and anatomical adaptations for echolocation by which they navigate
gnawing mammal, lagomorph - relative large gnawing animals; distinguished from rodents by having two pairs of upper incisors specialized for gnawing
gnawer, rodent - relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing
Ungulata - in former classifications a major division of Mammalia comprising all hoofed mammals; now divided into the orders Perissodactyla (odd-toed ungulates) and Artiodactyla (even-toed ungulates)
hoofed mammal, ungulate - any of a number of mammals with hooves that are superficially similar but not necessarily closely related taxonomically
Unguiculata - in former classifications a major division of Mammalia comprising mammals with nails or claws; distinguished from hoofed mammals and cetaceans
unguiculate, unguiculate mammal - a mammal having nails or claws
cony, das, dassie, hyrax, coney - any of several small ungulate mammals of Africa and Asia with rodent-like incisors and feet with hooflike toes
pachyderm - any of various nonruminant hoofed mammals having very thick skin: elephant; rhinoceros; hippopotamus
edentate - primitive terrestrial mammal with few if any teeth; of tropical Central America and South America
anteater, pangolin, scaly anteater - toothless mammal of southern Africa and Asia having a body covered with horny scales and a long snout for feeding on ants and termites
primate - any placental mammal of the order Primates; has good eyesight and flexible hands and feet
tree shrew - insectivorous arboreal mammal of southeast Asia that resembles a squirrel with large eyes and long sharp snout
colugo, flying cat, flying lemur - arboreal nocturnal mammal of southeast Asia and the Philippines resembling a lemur and having a fold of skin on each side from neck to tail that is used for long gliding leaps
proboscidean, proboscidian - massive herbivorous mammals having tusks and a long trunk
plantigrade, plantigrade mammal - an animal that walks with the entire sole of the foot touching the ground as e.g. bears and human beings
digitigrade, digitigrade mammal - an animal that walks so that only the toes touch the ground as e.g. dogs and cats and horses
Adj.1.eutherian - of or relating to or belonging to the subclass Eutheria; "eutherian mammals"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The Majority of Mammals, Including People, are Eutherian
Some GAL have attracted attention in the reproductive sciences because they are highly expressed at the maternal-fetal interface, their functional significance in eutherian pregnancies, and their dysregulated expression is observed in the "great obstetrical syndromes." These GAL; may serve as important proteins involved in maternal-fetal interactions.
Langer deals with the anatomy of the stomach, small intestine, caecum, and colon of most eutherian orders and suborders.
Another seven predicted families are conserved also in other eutherian species.
These rat-like creatures, from a group called ( eutherian mammals or placental mammals, would also have been the ancestors of most mammals in the world, including those that are starkly different from us, like baleen whales, and our closest friends, dogs and cats.
Resolving conflict in eutherian mammal phylogeny using phylogenomics and the multispecies coalescent model.
Twenty species of mammals were recorded, of which one was a monotreme, eight were marsupial and eleven were eutherian (Table 2).
US frequency range of bats and rats partially overlaps and both eutherian lineages possess similar encoding process of mechanical US waves, although with different aims as spatial navigation and social communication [7, 8].
He, "A motif of eleven amino acids is a structural adaptation that facilitates motor capability of eutherian prestin," Journal of Cell Science, vol.