Etymologically

Etymology and origin of the Latin word plagius

Confidence
Established
Formation
Borrowing
First attested
2nd half of the 1st century BC, Hyginus
Borrowed from
Ancient Greek πλάγιος
Ultimate origin
Ancient Greek πλάγιος
Etymology tree
inherited borrowed derived
Ancient Greek πλάγιος
Latin plagia
Latin plagius

Forms

plagius (feminine plagia, neuter plagium); first/second-declension adjective[1][2]

Etymology

It is borrowed from Ancient Greek πλάγιος (plágios, “slanting, sideways”).[1][2]

Earliest recorded meaning

The TLL's first example is from the Astronomica of Hyginus, where the constellation Arctophylax rises plagius, “sideways”.[2] The OLD defines it as placed sideways, horizontal.[1]

Semantic evolution

An Old Latin version of Deuteronomy uses the neuter as a noun, “at the side” of the ark, translating the Greek; the TLL also records it of a shore where ships can put in.[2] Köbler finds it in the Antonine Itinerary.[3]

In medieval Latin plagius was one of the forms of a noun for a beach or a mountain slope.[4][3] The TLL traces a number of Romance words for a shore or slope to it, among them Italian piaggia and spiaggia, Catalan platja and, through Italian, French plage.[2] In music it described the plagal modes, whence plagalis.[5][6]

Timeline

  • 2nd half of the 1st century BC – Hyginus uses it of a constellation rising sideways.[2][3]
  • 3rd century AD – It occurs in the Antonine Itinerary.[3]

Meanings

Adjective

  1. Placed sideways, slanting, horizontal.[1][2]
  2. (neuter as noun) The side of something.[2]
  3. Of a shore: where ships can put in.[2]
  4. (Medieval Latin, music) Plagal (of a mode).[5][6]

Noun

  1. (Medieval Latin) A beach; a mountain slope.[4][3]

Usage notes

The DMLBS has a separate medieval plāgius, “one who wounds; a surgeon”, formed from plāga “wound”, which the Catholicon Anglicum of 1483 records.[7][3]

References

  1. ^ a b c d Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  2. ^ a b c d e f g h i Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  3. ^ a b c d e f Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  4. ^ a b Niermeyer, J. F. (1976), Mediae Latinitatis Lexicon Minus, Leiden: Brill
  5. ^ a b Lexicon mediae et infimae Latinitatis Polonorum (1953–), Kraków: Instytut Języka Polskiego PAN; electronic ed. elexicon.scriptores.pl
  6. ^ a b Lexicon musicum Latinum medii aevi (1992–), Munich: Bayerische Akademie der Wissenschaften; online ed. Wörterbuchnetz
  7. ^ Latham, R. E., D. R. Howlett, R. K. Ashdowne, et al. (1975–2013), Dictionary of Medieval Latin from British Sources, London: British Academy / Oxford University Press

Related etymologies

Cite this entry

“Plagius.” Etymologically, 24 Oct. 2026, etymologically.com/la/plagius. Accessed 24 Oct. 2026.

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