orto-

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

• IPA^(key): /ˈorto-/, [ˈo̞rt̪o̞-]

orto-

1. (chiefly in loanwords) ortho-

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

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

orto-

1. ortho-

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

orto-

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

• Toro, roto, rotò, toro

Learned borrowing from Ancient Greek ὀρθός (orthós).

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

orto-

1. ortho-
2. (chemistry) ortho-

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

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

orto-

1. ortho-

• “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

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

orto-

1. ortho-

• “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