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Definition of mammal
mammal
/ˈmæm.əl/
mam · mal
Plural:mammals
•Adjective:mammalian
mammal Lexical Profile
CEFR
B1
Grade
3
Tier
2
Usage
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mammal Game Scores & Validity
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Wordle Guess
• noun
1
A warm-blooded vertebrate animal of the class Mammalia, distinguished by the possession of hair or fur, the secretion of milk by females for the nourishment of the young, and typically the birth of live young.
Example
"Whales, elephants, and humans are all examples of mammals that give birth to live offspring rather than laying eggs."
Synonyms
View all synonyms for mammal• Rhymes for mammal
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Word Origin & Etymology
Derived from the Late Latin 'mammalis' (of the breast), which comes from the Latin 'mamma' (breast), referring to the mammary glands that define this class of animals.
Usage Trend
Historical frequency of usage in published text.
180019102020
Data source: Google Books Ngram Viewer
Cite this Entry
Wordmom. (2026). Definition of Mammal. In Wordmom Dictionary. Retrieved Oct 13, 2026, from https://wordmom.com/dictionary/mammal