OD

OD may refer to:

Non abbreviated meanings of OD

• Od (Language) (also Oad, Oadki, Odki), a language of the Oad people
• Od, a life force - see Odic force
• Od, a Nordic god - see Óðr
• Od, a replacement for "God" in some minced oaths

Health and medicine

• Doctor of Optometry (O.D.)
• Overdose, typically consuming too much of a drug
• omne in die - see "Once daily" - see also medical abbreviations used in prescriptions
• oculus dexter, a Latin term meaning "right eye" (oculus sinister means the left eye). Abbreviated OD and OS, these are most commonly used in prescriptions and other terminology in ophthalmology and optometry. Ocularis dexter or ocular dexter means "pertaining to the right eye" and is also abbreviated OD.
• Occupational disease, the health effects from exposures associated with a particular occupation
• Osteochondritis dissecans, a medical disease affecting the joints of both humans and animals

Basic science

• Oxygen Demand (biochemical, chemical, theoretical)
• Optical Density (absorbance)

Other

• od (Unix), a Unix program
• OD, Office Depot, a large 14,000 people US company for Office supplies
• O.D, a song by the British industrial band Sunna
• O.D. (musician), a founding member of the Finnish industrial band Velcra
• Object Desktop, a suite of skinning and customization programs by Stardock, or ObjectDock, another program by the same company
• Oblivion Dust, a Japanese rock band
• Occupation Double, a Quebec reality show that started in 2003.
• Odessa, Texas, a small city in western Texas
• Officer of the day
• Official Dress in the popular agriculture club National FFA Organization
• Old Diocesan, a former pupil of Diocesan College
• Olive Drab, as in OD Green, this color is used in many firearms today
• On-demand (disambiguation), various products or services which becomes available soon after being requested
• One Day Match, a type of shorter match in cricket
• Online dating
• OpenDocument, the only ISO acknowledged standard document file format
• Optical disc
• Order of Distinction, a civil honour of Jamaica
• Ordnance Datum, a vertical datum used in Great Britain as the basis for deriving altitudes on maps
• Organization development
• Original dance, the second part of an ice dancing competition
• Orphei Drängar, a Swedish male choir
• Outside diameter, a dimension commonly used to specify the size of tubing or pipe
• Pentium OverDrive, a brand of CPUs formerly produced by Intel
• Overdrive