monotreme
/'mɔnətri:m/
Definition
Noun: - A primitive, egg-laying mammal that is a member of the subclass Prototheria. Monotremes are the only living mammals that lay eggs instead of giving birth to live young.
Usage
The word "monotreme" is a scientific term used primarily in zoology and biology to classify a specific, rare order of mammals. It is used as a countable noun.
Examples
- The platypus and the echidna are the only living monotremes.
- Scientists study the monotreme to understand the evolution of mammals.
- As a monotreme, the echidna has a unique combination of reptilian and mammalian traits.
Advanced Usage
- Phylogenetic context: The term is often used in evolutionary biology to discuss the characteristics that distinguish monotremes from other mammalian groups like marsupials and placentals.
- The fossil record provides clues about early monotreme ancestors.
Variants and Related Words
- Monotremata (n): The biological order to which monotremes belong.
- Prototherian (n/adj): Relating to or being a member of the subclass Prototheria, which includes monotremes.
Synonyms
- Egg-laying mammal
Notes on Meaning
The definition is highly specific and refers exclusively to the biological classification. There are no significant idiomatic or figurative uses of this word. It does not form standard phrasal verbs.
Noun
-
the most primitive mammals comprising the only extant members of the subclass Prototheria
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