Etymologically

Etymology and origin of the Latin word iris

Confidence
Established
Formation
Borrowing
First attested
234–149 BC, Cato
Borrowed from
Ancient Greek ἶρις
Ultimate origin
Ancient Greek ἶρις
Etymology tree
inherited borrowed derived
Ancient Greek ἶρις
Latin iris
English iris

Pronunciation

  • Classical: [ˈiː.rɪs][1]
  • Ecclesiastical: [ˈiː.ris][1]

Forms

īris f (genitive īris or īridis); third declension[1]

Etymology

It is borrowed from Ancient Greek ἶρις (îris, “rainbow; iris plant”).[2][1][3] The Greek word is of uncertain origin; it has traditionally been traced to Proto-Indo-European *wei- (“to bend, turn”).[4][3]

The Romans already connected the plant with the rainbow: Pliny the Elder says it is named for its many colours, like the rainbow's.[2] Servius derived the goddess's name from Ancient Greek ἔρις (éris, “strife”), because she was sent to sow discord.[5]

Earliest recorded meaning

Its earliest occurrence is in Cato's treatise on agriculture, which uses dried, crushed iris in a recipe, the orris root.[2][3]

Semantic evolution

In poetry it is the name of Iris, the messenger of the gods and goddess of the rainbow, whom Juno sends down from heaven in Virgil and Ovid.[2][6] Manilius and Seneca use the goddess as a personification of the rainbow itself,[2] and the word means simply “rainbow” in Seneca's Natural Questions, Apuleius and the Vulgate, where a rainbow surrounds the throne in the Apocalypse.[6][7] Pliny the Elder also uses it for an iridescent stone, perhaps a prismatic rock crystal, which throws the colours of the rainbow on a wall.[2][6]

As the name of the plant and of its fragrant root it was common in medicine and perfumery, in Celsus, Columella and Pliny.[2] Medieval writers kept the senses “rainbow” and “iridescent stone”;[8] Bede calls the rainbow a sign of God's reconciliation.[8] English took iris as the name of the plant in the late 14th century and for the membrane of the eye in the 15th.[4]

Timeline

  • 234–149 BC – Cato uses iris root in a recipe.[2][3]
  • 70–19 BC – Virgil names the goddess Iris, sent by Juno.[2][3]
  • 4 BC–65 AD – Seneca uses it for the rainbow.[7][3]
  • 23/24–79 AD – Pliny the Elder uses it for an iridescent stone.[2][3]
  • 390–406 AD – The Vulgate uses it for the rainbow around the throne.[6][3]
  • late 14th century – English borrows it as the name of the plant.[4]

Meanings

Noun

  1. (mythology) Iris, the messenger of the gods and goddess of the rainbow.[2][6]
  2. A rainbow.[2][6][7]
  3. The iris plant; its fragrant root, orris, used in perfumes and medicine.[2][6]
  4. An iridescent stone, perhaps prismatic rock crystal.[2][6]

Word family

  • iricolor
  • īrinus

Usage notes

Iris is also the name of a river of Pontus that flows into the Black Sea, mentioned by Pliny the Elder.[7][6] The OLD lists a separate, doubtful īris “hedgehog” in Plautus, perhaps better written ēr-, which belongs with ericius.[2]

References

  1. ^ a b c d Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o Glare, P. G. W., ed. (2012), Oxford Latin Dictionary, 2nd ed., Oxford: Oxford University Press
  3. ^ a b c d e f g h Köbler, Gerhard (2010), Lateinisches Abkunfts- und Wirkungswörterbuch für Altertum und Mittelalter, online ed., koeblergerhard.de
  4. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  5. ^ Thesaurus linguae Latinae (1900–), Leipzig: Teubner; Berlin: De Gruyter; open-access ed., Munich: Bayerische Akademie der Wissenschaften
  6. ^ a b c d e f g h i Lewis, Charlton T.; Short, Charles (1879), A Latin Dictionary, Oxford: Clarendon Press
  7. ^ a b c d Gaffiot, Félix (2016), Dictionnaire latin-français, new ed. by Gérard Gréco et al. (Gaffiot 2016), online ed.
  8. ^ a b 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

Borrowed into

Related etymologies

Cite this entry

“Iris.” Etymologically, 24 Oct. 2026, etymologically.com/la/iris. Accessed 24 Oct. 2026.

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