[muh-mey-lee-uh n, -meyl-yuh n]


an animal of the class Mammalia; mammal.


belonging or pertaining to the class Mammalia; characteristic of mammals.

Origin of mammalian

1825–35; < New Latin Mammali(a) (see mammal) + -an
Related formsmam·mal·i·ty [muh-mal-i-tee] /məˈmæl ɪ ti/, nounnon·mam·ma·li·an, noun, adjectiveun·mam·ma·li·an, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for mammalian

Contemporary Examples of mammalian

Historical Examples of mammalian

  • And we have seen the sudden increase of mammalian life in Tertiary times.

  • Mammalian bones are also plentifully distributed in the Danish kitchen-middens.

    Primitive Man

    Louis Figuier

  • No other mammalian baby is so much of a baby and yet comes so near to being no baby at all.


    Dallas Lore Sharp

  • No associated implements or remains of mammalian skeletons are recorded.

    Prehistoric Man

    W. L. H. Duckworth

  • He also considers that the mammalian scaphoid represents a centrale.

    The Vertebrate Skeleton

    Sidney H. Reynolds

Word Origin and History for mammalian

1813, from mammal + -ian. As a noun, from 1835.

Online Etymology Dictionary, © 2010 Douglas Harper