OD

• 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 or "once daily" both meaning "take once every day" • Doctor of Optometry (O.D.) • , , or , 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. == Other uses ==

• 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 ==See also==