Etymologically
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mammalian

This is the current revision of this entry, as edited by bogdan on 1 November 2026 at 04:50. This address is a permanent link to this version.
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Pronunciation

  • US: /məˈmeɪl.jən/, /məˈmeɪ.li.ən/[1]

Etymology

It is formed from English mammal + -ian,[2] or, in the analysis of the OED and Merriam-Webster, from the scientific Latin class name Mammalia and the English suffix -an.[3][4][5][6] Linnaeus coined the class name in the tenth edition of his “Systema Naturæ” (1758),[3][2][7] from the neuter plural of Late Latin mammālis (“of the breast”),[2][7][8] from Latin mamma (“breast”),[2][3][9] which Etymonline traces to Proto-Indo-European *mama.[2]

Earliest recorded meaning

Of, belonging to or characteristic of the Mammalia: 1813, in J. M. Good and others' Pantologia.[3][2] Dictionary.com dates the word to 1825–35,[6] and Barnhart records the noun from 1835 and the adjective only from 1851.[8]

Semantic evolution

The adjective is older than the noun mammal itself, which Etymonline and Barnhart date to 1826, as an English form of the class name, again in a work by J. M. Good;[2][8] the class name Mammalia had been used in English since 1773, in the Encyclopædia Britannica.[3][2] The noun mammalian, one of the Mammalia, followed in 1835, in W. Kirby,[3][2][8] but it has remained rare beside mammal.[4]

Timeline

  • 1813 – adjective, of or belonging to the mammals.[3][2]
  • 1835 – noun, a mammal.[3][2][8]

Meanings

Adjective

  1. Of, relating to or typical of mammals: mammalian teeth.[5][3][4]

Noun

  1. (rare) A mammal.[5][3][4]

Word family

  • nonmammalian

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  3. ^ a b c d e f g h i j Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  4. ^ a b c d Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
  5. ^ a b c Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  6. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
  7. ^ a b Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
  8. ^ a b c d e Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
  9. ^ The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt