# Ordo

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***Ordo*** (Latin "order, rank, class") may refer to:

- A musical phrase constructed from one or more statements of a [rhythmic mode](/source/Rhythmic_mode) pattern and ending in a rest
- [Big O notation](/source/Big_O_notation) in calculation of algorithm computational complexity
- [Orda (organization)](/source/Orda_(organization)), also *ordo* or *horde*, was a nomadic palace for the Mongol aristocrats and the Turkic rulers
- [Order (biology)](/source/Order_(biology)), in the taxonomy of organisms
- Ordo Recitandi or [directorium](/source/Directorium) gives complete details of the celebration of the Eucharist and the Liturgy of the Hours, beginning with the first Sunday of Advent
- Religious order in [monasticism](/source/Monasticism)
- The Inquisition from *[Warhammer 40,000](/source/Warhammer_40,000)* has three main ordines: Ordo Malleus, Ordo Hereticus and Ordo Xenos
- [Ordo Templi Orientis](/source/Ordo_Templi_Orientis), an organization dedicated to the religious philosophy of Thelema
- The scholarly economic/political science journal [*The ORDO Yearbook of Economic and Social Order*](/source/ORDO_(journal))
- [Canderous Ordo](/source/List_of_Star_Wars:_Knights_of_the_Old_Republic_characters#Ordo,_Canderous), a fictional character in the Star Wars video games *[Star Wars: Knights of the Old Republic](/source/Star_Wars:_Knights_of_the_Old_Republic_(video_game))* and *[Star Wars Knights of the Old Republic II: The Sith Lords](/source/Star_Wars_Knights_of_the_Old_Republic_II:_The_Sith_Lords)*
- A fictional encryption program from the book *[Cryptonomicon](/source/Cryptonomicon)*, by Neal Stephenson
- [Novus ordo seclorum](/source/Novus_ordo_seclorum) which appears on the reverse of the Great Seal of the United States
- Ordo Missae or [Order of Mass](/source/Order_of_Mass), the order (regulation) of the Eucharist in the Roman Rite of the [Catholic Church](/source/Catholic_Church)
- [Ordo (military unit)](/source/Ordo_(military_unit)), a Roman military unit, originally a maniple, at the Imperial times, the centuria

## See also

- [Urdu](/source/Urdu)

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Adapted from the Wikipedia article [Ordo](https://en.wikipedia.org/wiki/Ordo) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Ordo?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.