OD

• Old Diocesan, a former pupil of Diocesan College
• Old Dunelmian, a former pupil of Durham School

• OD or o.d., an abbreviation used in medical prescriptions for {{lang|la|omne in die}} or "once daily" both meaning "take once every day"
• Doctor of Optometry (O.D.)
• {{lang|la|Oculus dexter}}, {{lang|la|ocular dexter}}, or {{lang|la|ocularis dexter}}, meaning "right eye" in general ophthalmologic or optometric usage, particularly in eyeglass prescriptions
• Osteochondritis dissecans, a medical disease affecting the joints of both humans and animals
• Overdose, the inadvertent drug effects of the user rendered unresponsive or fatally succumbed due to unsophistication of self-medicating being unaccustomed to quantities greater than recommended

• Oblivion Dust, a Japanese rock band
• Old Dominion (band), an American country music band
• One Direction, a British/Irish pop music band
• Orphei Drängar, a Swedish male choir
• The OD EP, a 2012 extended play by Danny Brown
• Overly Dedicated, a 2010 mixtape by Kendrick Lamar
• "O.D", a song by Sunna from the album One Minute Science (2000)
• "OD", an alternative name for the song "Diamond Boy (DTM)" by SZA from Lana (2024)
• "OD", a song by Earl Sweatshirt from the EP Feet of Clay (2019)

• Batik Air Malaysia (IATA airline code OD)
• Ordnungsdienst, Jewish order service in ghettos during the war
• Organization development

• Super OD, a Ghanaian actor
• O.D (Gatchaman Crowds), a character in the anime series Gatchaman Crowds
• Ód or Óðr, a Nordic god

• Odisha, India
• Stormarn (district), Germany (vehicle plate code OD)

• Optical density
• Outside diameter (also: O.D.), cylinder or pipe external diameter
• Ordnance datum, in Britain, an Ordnance Survey data point
• od (Unix), a Unix program
• Object Desktop, a suite of skinning and customization programs by Stardock, or ObjectDock, another program by the same company
• Optical disc
• Organization development, the study of organizational change and performance
• Ordinal definable set, a set requiring only finitely-many ordinals to define under first-order logic.

• OD (video game), an upcoming video game developed by Kojima Productions and published by Xbox Game Studios
• Od language, an Indo-Aryan language of Pakistan
• Odic force or Od, a life force
• Occupation Double, a Quebec reality show that started in 2003
• Official Declaration, part of Latter-day Saint scripture
• Olive drab, a color, particularly of some United States Army uniforms
• Online dating
• Original dance, the second part of an ice dancing competition
• Order of Distinction, a civil honour of Jamaica

{{canned search|od|o-d}}

• {{srt}}
• ODS (disambiguation)
• Oder (disambiguation)
• Odor (disambiguation)

{{Disambiguation}}