orto-

See also: orto and Orto

Danish

Etymology

From Ancient Greek ὀρθο- (ortho-), combining form of ὀρθός (orthós, “straight, upright, erect”).

Prefix

orto-

1. ortho-

Derived terms

Danish terms prefixed with orto-

ortografi

References

• “orto-” in Den Danske Ordbog

Finnish

Etymology

From Ancient Greek ὀρθο- (ortho-), combining form of ὀρθός (orthós, “straight, upright, erect”).

Pronunciation

• IPA^(key): /ˈorto-/, [ˈo̞rt̪o̞-]

Prefix

orto-

1. (chiefly in loanwords) ortho-

Derived terms

Finnish terms prefixed with orto-

ortogeneesi

ortokeskus

ortokolmio

ortokuva

ortonormeerattu

ortonormitettu

ortopiihappo

ortouni

ortovety

Italian

Pronunciation

• IPA^(key): /or.to/
• Hyphenation: or‧to-

Etymology 1

Learned borrowing from Ancient Greek ὀρθο- (ortho-), combining form of ὀρθός (orthós, “straight, upright, erect”).

Prefix

orto-

1. ortho-

Derived terms

Italian terms prefixed with orto-

ortoacido

ortobicupola

ortocefalia

ortocentrico

ortocentro

ortoclasio

ortocromatico

ortocromatismo

ortofloricoltore

ortofloricoltura

ortofonia

ortofosfato

ortofosforico

ortofoto

ortofotografia

ortofrenico

ortofrenopedia

ortofrutticolo

ortofrutticoltore

ortofrutticoltura

ortogenesi

ortogenetico

ortografia

ortografico

ortoidrogeno

ortologo

ortomercato

ortonitrato

ortodromia

ortoepia

ortognatismo

ortottica

ortottico

ortopantomografia

ortopantomogramma

ortopedia

ortoressia

ortorombico

ortoscopia

ortoscopico

ortoscopio

ortostatico

ortoterapia

Etymology 2

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

Prefix

orto-

1. alternative form of orti- (“garden, orchard”)

Anagrams

• Toro, roto, rotò, toro

Polish

Etymology

Etymology tree

Proto-Indo-European *h₃erdʰ-der.

Proto-Hellenic *ortʰwós

Ancient Greek ὀρθός (orthós)lbor.

Polish orto-

Learned borrowing from Ancient Greek ὀρθός (orthós).

Pronunciation

• IPA^(key): /ɔr.tɔ/
• Rhymes: -ɔrtɔ
• Syllabification: or‧to-

Prefix

orto-

1. ortho-
2. (chemistry) ortho-

Derived terms

Polish terms prefixed with orto-

ortofonia

Further reading

• “orto-”, in Polish dictionaries at PWN‎^[1] (in Polish)
• J. Karłowicz, A. Kryński, W. Niedźwiedzki, editors (1904), “orto-”, in Słownik języka polskiego (in Polish), volume 3, Warsaw, page 831

Portuguese

Etymology

Borrowed from Ancient Greek ὀρθο- (ortho-), combining form of ὀρθός (orthós, “straight, upright”).

Pronunciation

 

• (Brazil) IPA^(key): /oʁ.to/ [oh.to]

• (Brazil) IPA^(key): /oʁ.to/ [oh.to]
  • (São Paulo) IPA^(key): /oɾ.to/
  • (Rio de Janeiro) IPA^(key): /oʁ.to/ [oχ.to]
  • (Caipira) IPA^(key): /oɻ.to/

• (Portugal) IPA^(key): /ɔɾ.tu/

Prefix

orto-

1. ortho-

Derived terms

Portuguese terms prefixed with orto-

ortodoxo

ortofonia

ortofosfórico

ortogonal

ortografia

ortodontia

ortónimo

ortopedia

ortopolifosfato

ortorrômbico

ortovanadato

Further reading

• “orto-”, in Dicionário Aulete Digital (in Portuguese), Rio de Janeiro: Lexikon Editora Digital, 2008–2026
• “orto-”, in Dicionário Priberam da Língua Portuguesa (in Portuguese), Lisbon: Priberam, 2008–2026

Spanish

Etymology

Borrowed from Ancient Greek ὀρθο- (ortho-), combining form of ὀρθός (orthós, “straight, upright”).

Prefix

orto-

1. ortho-

Derived terms

Spanish terms prefixed with orto-

ortogénesis

ortomitosis

ortostático

ortodoncia

Further reading

• “orto-”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025