monotreme

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mon·o·treme

(mŏn′ə-trēm′)

Any of various egg-laying mammals of the order Monotremata of Australia and New Guinea, whose only living members are the platypus and the echidnas.

[From New Latin Monotrēmata, order name : mono- + Greek trēma, trēmat-, perforation (from the fact that they have a single cloaca rather than an anus separate from genital and urinary orifices, as in placental mammals and marsupials); see terə- in Indo-European roots.]

mon′o·trem′a·tous (-trĕm′ə-təs) 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.

monotreme

(ˈmɒnəʊˌtriːm)

(Animals) any mammal of the primitive order Monotremata, of Australia and New Guinea: egg-laying toothless animals with a single opening (cloaca) for the passage of eggs or sperm, faeces, and urine. The group contains only the echidnas and the platypus

[C19: via New Latin from mono- + Greek trēma hole]

monotrematous adj

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

mon•o•treme

(ˈmɒn əˌtrim)

n.

any egg-laying mammal of the order Monotremata, comprising only the duckbill and the echidnas of Australia and New Guinea.

[1825–35; < French monotrème < New Latin monotrematus=mono- mono- + -trematus -holed, adj. use of Greek trêma, s. trēmat- hole, perforation; see -ous]

mon·o·treme

(mŏn′ə-trēm′)

The most primitive type of living mammal. Monotremes lay eggs, and the females have no teats but provide milk directly through the skin to their young. Monotremes include only the duck-billed platypus, found in Australia and New Guinea, and the echidnas, found only in New Guinea.

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.

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Noun 1. [画像:monotreme - the most primitive mammals comprising the only extant members of the subclass Prototheria]monotreme - the most primitive mammals comprising the only extant members of the subclass Prototheria

egg-laying mammal

prototherian - primitive oviparous mammals found only in Australia and Tasmania and New Guinea

echidna, spiny anteater, anteater - a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia

echidna, spiny anteater, anteater - a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to New Guinea

duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus, platypus, duckbill - small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae

Translations

Kloakentier

monotrème

nefdýr

단공류

stekowce

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References in periodicals archive ?

Phylogeny of Spleen was proposed from a 'primitive type' with closed circulation (Characteristic of monotremes, insectivores and tree shrews), to 'archetypal type' with open circulation (Peculiar to mice, gerbils, bats and marsupials), further into 'blood-storing' spleens (Ungulates and carnivores) and 'defensive' spleens (Old World monkeys and the majority of rodents) 7.

MORPHOMETRIC ANALYSIS OF THE HUMAN SPLEEN

Walker's Mammals of the World: Monotremes, Marsupials, Afrotherians, Xenarthrans, and Sundatherians

"Although we've identified this highly unusual protein as only existing in monotremes, this discovery increases our knowledge of protein structures in general, and will go on to inform other drug discovery work done at the Centre," she said.

Platypus milk: A life saviour!

Monotremes and Marsupials: A Reference for Zoological Institutions.

Comparative Analysis of Retinal Ganglion Cell Topography and Behavioral Ecology in Australian Marsupials/Analisis Comparativo de la Topografia de las Celulas Ganglionares de la Retina y Ecologia del Comportamiento en Marsupiales Australianos

Brazenor CW (1950) The Mammals of Victoria and the Dental Characteristics of Monotremes and Australian Marsupials.

Changes in Victoria's mammal fauna since European settlement

The absence of isthmus is also noted in amphibians, birds, and among mammals such as monotremes, some marsupials, cetaceans, carnivores, and rodents.

A study on morphometric features and incidence of agenesis of isthmus of thyroid gland

The spiny anteater living in Australia, New Zealand and New Guinea as well as the duck-billed platypus are monotremes.

Books of quality before library hubs

Known as monotremes, these mammals were more common tens of millions of years ago.

Weird and wonderful; FEATURE What's in the museum? Well, some rather odd things, it turns out. A new exhibition called Stuffed, Pickled & Pinned aims to showcase some of the unusual artifacts to be found in Wales' small institutions..

(17) Although, no information is available on the presence or absence of H19 in the monotremes, it is highly likely that there is no H19 (and H19-DMR) in the platypus, because it was reported that IGF2 is biallelically expressed.

Mammalian-specific genomic functions: newly acquired traits generated by genomic imprinting and LTR retrotransposon-derived genes in mammals

Volume 5 of the Handbook of the mammals of the world includes monotremes and marsupials and covers 21 families in eight orders.

Wilson D.E. & Mittermeier R.A. (eds.): Handbook of the mammals of the world--vol. 5, Monotremes and Marsupials