OD

OD or Od may refer to:

Education[edit]

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

Medicine[edit]

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 use of a drug in quantities greater than recommended

Music[edit]

Oblivion Dust, a Japanese rock band
One Direction, a British/Irish pop music band
Orphei Drängar, a Swedish male choir
O.D, a song by Sunna from the album One Minute Science (2000)
Overly Dedicated, a 2010 mixtape by Kendrick Lamar
The OD EP, a 2012 extended play by Danny Brown

Organizations[edit]

Malindo Air (IATA airline code OD)
Ordnungsdienst , a collaborationist organization in Nazi-occupied Poland
Organization development

People[edit]

O.D. (musician), a member of Velcra
Super OD, a Ghanaian actor
O.D (Gatchaman Crowds), a character in the anime series Gatchaman Crowds

Places[edit]

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

Science and technology[edit]

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[edit]

Ód or Óðr, a Nordic god
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
OD - original designation in Taxonomy

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OD

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