{{wiktionary|ordo}} '''''Ordo''''' (Latin "order, rank, class") may refer to: * A musical phrase constructed from one or more statements of a rhythmic mode pattern and ending in a rest * Big O notation in calculation of algorithm computational complexity * Orda (organization), also ''ordo'' or ''horde'', was a nomadic palace for the Mongol aristocrats and the Turkic rulers * Order (biology), in the taxonomy of organisms * Ordo Recitandi or 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 * The Inquisition from ''Warhammer 40,000'' has three main ordines: Ordo Malleus, Ordo Hereticus and Ordo Xenos * 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'' * Canderous Ordo, a fictional character in the Star Wars video games ''Star Wars: Knights of the Old Republic'' and ''Star Wars Knights of the Old Republic II: The Sith Lords'' * A fictional encryption program from the book ''Cryptonomicon'', by Neal Stephenson * Novus ordo seclorum which appears on the reverse of the Great Seal of the United States * Ordo Missae or Order of Mass, the order (regulation) of the Eucharist in the Roman Rite of the Catholic Church * Ordo (military unit), a Roman military unit, originally a maniple, at the Imperial times, the centuria
==See also== * Urdu
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