OD
OD or Od may refer to: == Education == Old Diocesan, a former pupil of Diocesan College Old Dunelmian, a former pupil of Durham School == Medicine == OD or o.d., an abbreviation used in medical prescriptions for omne in die or "once daily" both meaning "take once every day" Doctor of Optometry (O.D.) Oculus dexter, ocular dexter, or 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 == Music == 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) == Organizations == Batik Air Malaysia (IATA airline code OD) Ordnungsdienst, Jewish order service in ghettos during the war Organization development == People and characters == Super OD, a Ghanaian actor O.D (Gatchaman Crowds), a character in the anime series Gatchaman Crowds Ód or Óðr, a Nordic god == Places == Odisha, India Stormarn (district), Germany (vehicle plate code OD) == Science and technology == 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.