Definition of amniote in English:

amniote

nounˈamnɪəʊtˈamnēˌōt

Zoology

An animal whose embryo develops in an amnion and chorion and has an allantois; a mammal, bird, or reptile.
〔动〕羊膜动物
Example sentencesExamples
- The sequence from the early amniotes to the early mammals is the most fully documented of the major transitions in vertebrate evolution.
- Mammals are also amniotes, but they differ from reptiles in the structure of their skulls (especially the regions associated with chewing and hearing).
- The ancestral amniotes were small animals, superficially resembling primitive, insectivorous lizards.
- The oldest known amniotes - close to the ancestry of all reptiles, birds, and mammals - appeared in the early Pennsylvanian, about 310 million years ago.
- Vertebral counts in modern amniotes, amphibians, and fish, can vary due to environment or change with growth.

Origin

Late 19th century: from modern Latin Amniota, back-formation from amniotic.

Definition of amniote in US English:

amniote

nounˈamnēˌōt

Zoology

An animal whose embryo develops in an amnion and chorion and has an allantois; a mammal, bird, or reptile.
〔动〕羊膜动物
Example sentencesExamples
- The sequence from the early amniotes to the early mammals is the most fully documented of the major transitions in vertebrate evolution.
- The ancestral amniotes were small animals, superficially resembling primitive, insectivorous lizards.
- The oldest known amniotes - close to the ancestry of all reptiles, birds, and mammals - appeared in the early Pennsylvanian, about 310 million years ago.
- Vertebral counts in modern amniotes, amphibians, and fish, can vary due to environment or change with growth.
- Mammals are also amniotes, but they differ from reptiles in the structure of their skulls (especially the regions associated with chewing and hearing).

Origin

Late 19th century: from modern Latin Amniota, back-formation from amniotic.

词汇	amniote
释义	Definition of amniote in English: amniote nounˈamnɪəʊtˈamnēˌōt Zoology An animal whose embryo develops in an amnion and chorion and has an allantois; a mammal, bird, or reptile. 〔动〕羊膜动物 Example sentencesExamples The sequence from the early amniotes to the early mammals is the most fully documented of the major transitions in vertebrate evolution. Mammals are also amniotes, but they differ from reptiles in the structure of their skulls (especially the regions associated with chewing and hearing). The ancestral amniotes were small animals, superficially resembling primitive, insectivorous lizards. The oldest known amniotes - close to the ancestry of all reptiles, birds, and mammals - appeared in the early Pennsylvanian, about 310 million years ago. Vertebral counts in modern amniotes, amphibians, and fish, can vary due to environment or change with growth. Origin Late 19th century: from modern Latin Amniota, back-formation from amniotic. Definition of amniote in US English: amniote nounˈamnēˌōt Zoology An animal whose embryo develops in an amnion and chorion and has an allantois; a mammal, bird, or reptile. 〔动〕羊膜动物 Example sentencesExamples The sequence from the early amniotes to the early mammals is the most fully documented of the major transitions in vertebrate evolution. The ancestral amniotes were small animals, superficially resembling primitive, insectivorous lizards. The oldest known amniotes - close to the ancestry of all reptiles, birds, and mammals - appeared in the early Pennsylvanian, about 310 million years ago. Vertebral counts in modern amniotes, amphibians, and fish, can vary due to environment or change with growth. Mammals are also amniotes, but they differ from reptiles in the structure of their skulls (especially the regions associated with chewing and hearing). Origin Late 19th century: from modern Latin Amniota, back-formation from amniotic.
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