monotreme

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Related to Monotremes: Placentals

mon·o·treme

 (mŏn′ə-trēm′)
n.
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.

monotreme

(ˈmɒnəʊˌtriːm)
n
(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

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.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.monotreme - the most primitive mammals comprising the only extant members of the subclass Prototheriamonotreme - the most primitive mammals comprising the only extant members of the subclass Prototheria
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
nefdýr
단공류
stekowce
References in periodicals archive ?
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.
Brazenor CW (1950) The Mammals of Victoria and the Dental Characteristics of Monotremes and Australian Marsupials.
The absence of isthmus is also noted in amphibians, birds, and among mammals such as monotremes, some marsupials, cetaceans, carnivores, and rodents.
The spiny anteater living in Australia, New Zealand and New Guinea as well as the duck-billed platypus are monotremes.
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.
Volume 5 of the Handbook of the mammals of the world includes monotremes and marsupials and covers 21 families in eight orders.
Evolution, Identification and characterization of amelogenin genes in monotremes, reptiles, and amphibians (tooth formationyevolutionary innovations).
Monotremes are mammals--but they are only distantly related to us.
Krosoczka is moving from lunch ladies to monotremes, and he will introduce his latest characters to children and adults this evening at the Worcester Public Library as part of the summer reading kickoff and Reading in Our City Week.
The active spermatogenesis in intra-abdominal testes is known from a wide variety of mammals including monotremes and some insectivores, including shrews.
This leaves open the question whether the eutherian XY evolved 310 million years ago, shortly after the common ancestor of mammals and birds/reptiles, or less than 166 million years ago, at the time of the common ancestor of monotremes and eutherians (Figure 5).