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medial

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Etymology and origin of the English word medial

Confidence
Established
Formation
Borrowing
First attested
1570 Billingsley, translation of Euclid
Borrowed from
Latin medialis
Ultimate origin
Latin medius
Etymology tree
inherited borrowed derived
Latin medius
Italian mezzo
Latin medialis
English medial
From the same root
Latin dimidius ← medius
Latin intermedius ← medius
Latin medietas ← medius
Latin medio ← medius
Latin mediterraneus ← medius

Pronunciation

  • /ˈmiː.di.əl/[1]

Etymology

It is borrowed from Late Latin mediālis (“of the middle, situated in the middle”),[2][3][4][5] from Latin medius (“middle”) and the suffix -ālis,[2][6] from Proto-Indo-European *medhyo- (“middle”).[3][4] The OED finds the Late Latin word from the 3rd–4th century, and in British sources in the first Latin translation of Euclid (c. 1120) and in a treatise on music (c. 1326).[2] French médial is recorded in 1754, of a letter in the middle of a word.[2]

Earliest recorded meaning

Relating to a mathematical mean or average, chiefly in medial line: 1570, in Billingsley's translation of Euclid's Elements.[2][5][3] Merriam-Webster also dates this sense to 1570.[6]

Semantic evolution

From the mathematical mean the word passed to the general sense "in the middle, intermediate", which the OED records from 1684 and Etymonline from 1721;[2][3] in this sense it was used early of letters and sounds in the middle of a word.[2] From 1778 to 1894 it could also mean of average size or attainments.[2] In anatomy and zoology it has meant, since 1803, situated in or towards the median plane of the body.[2] The noun, a medial letter or sound or the special form of a letter used in the middle of a word, is first found in 1776, in a grammar of Arabic.[2][3] In 1833 phonetics used it for a voiced unaspirated stop, but this use soon died out;[2] Merriam-Webster still records the adjective for the voiced stops of ancient Greek.[6] The mathematical sense is now rare.[2]

Timeline

  • 1570 – relating to a mathematical mean.[2][5][6]
  • 1684 – in the middle, intermediate; of a letter or sound, in the middle of a word.[2] Etymonline dates the general sense to 1721.[3]
  • 1776 – noun, a medial letter or sound.[2][3]
  • 1778 – of average size (obsolete by 1894).[2]
  • 1803 – anatomy, towards the median plane of the body.[2]
  • 1833 – phonetics, a voiced unaspirated stop (obsolete).[2]

Meanings

Adjective

  1. Situated or occurring in the middle; intermediate or median.[6][7][2]
  2. (anatomy) Situated in or towards the middle of the body or of an organ.[6][2]
  3. (linguistics) Occurring in the middle of a word, between the initial and final positions: the medial t in "water".[6][2]
  4. (mathematics) Relating to a mean or average.[7][2]
  5. Ordinary or average in size.[7]

Noun

  1. A medial sound or letter, or the form of a letter used in the middle of a word.[6][2]
  2. (phonetics) A voiced stop consonant; a media.[6][7]

Word family

  • medially
  • postmedial
  • supermedial
  • submedial
  • ventromedial
  • medial moraine

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p q r s t u v w Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  3. ^ a b c d e f g Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  4. ^ a b The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
  5. ^ a b c Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
  6. ^ a b c d e f g h i Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  7. ^ a b c d Collins English Dictionary (2023), Glasgow: HarperCollins

Related etymologies

Cite this entry

“Medial.” Etymologically, 1 Nov. 2026, etymologically.com/en/medial. Accessed 1 Nov. 2026.

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