amniote: meaning, definition, pronunciation and examples
RareTechnical/Scientific
Quick answer
What does “amniote” mean?
A vertebrate animal whose embryo develops within an amnion (a fluid-filled sac) during gestation.
Audio
Pronunciation
Definition
Meaning and Definition
A vertebrate animal whose embryo develops within an amnion (a fluid-filled sac) during gestation; includes reptiles, birds, and mammals.
Used in evolutionary biology to describe the clade of tetrapods that possess an amnion, a key adaptation for reproduction on land, which distinguishes them from amphibians and fish.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling and pronunciation are consistent.
Connotations
None beyond the strict scientific definition in either variety.
Frequency
Extremely low frequency in general language, used exclusively in biological/zoological academic texts and discourse.
Grammar
How to Use “amniote” in a Sentence
[Amniote] + [verb: evolved/diverged/developed]the evolution/development of [amniote]classified as an [amniote]Vocabulary
Collocations
Examples
Examples of “amniote” in a Sentence
adjective
British English
- The amniote condition was a major evolutionary step.
American English
- Amniote characteristics include the presence of extra-embryonic membranes.
Usage
Meaning in Context
Business
Not used.
Academic
Core term in vertebrate zoology, evolutionary biology, and palaeontology.
Everyday
Virtually never used.
Technical
Used with precise taxonomic and embryological meaning in scientific papers and textbooks.
Vocabulary
Synonyms of “amniote”
Neutral
Weak
Vocabulary
Antonyms of “amniote”
Watch out
Common Mistakes When Using “amniote”
- Misspelling as 'ammniote' or 'amniot'.
- Confusing with 'amnion' (the membrane) or 'amniotic'.
- Using it as a general term for any land animal.
FAQ
Frequently Asked Questions
Yes, humans are mammals, and all mammals are amniotes.
The key difference is the presence of an amnion during embryonic development. Amniotes have this fluid-filled sac; anamniotes (like fish and amphibians) do not.
Yes, though less common. It can be used attributively (e.g., 'amniote vertebrates', 'amniote evolution').
It defines a major monophyletic group (clade) of vertebrates whose shared derived characteristic—the amnion—marks a critical evolutionary transition to complete terrestrial independence in reproduction.
A vertebrate animal whose embryo develops within an amnion (a fluid-filled sac) during gestation.
Amniote is usually technical/scientific in register.
Amniote: in British English it is pronounced /ˈæmniəʊt/, and in American English it is pronounced /ˈæmnioʊt/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: 'AMNIOTE' has 'AMNIO' like 'amniotic fluid', which surrounds the baby. Animals with this fluid sac (reptiles, birds, us) are amniotes.
Practice
Quiz
Which of the following is NOT an amniote?