OS

  1. (initialism) .  Ordnance Survey.
  2. (initialism) .  (software) operating system.
  3. (initialism) .  oculus sinister — left eye.
  4. (initialism) .  outsize.
  5. (initialism) .  Old Style; a term used in English language historical studies to indicate that a date conforms to the Julian calendar instead of the modern Gregorian calendar.
  6. Noun.  (UK) an Ordnance Survey map.
  7. Noun.  (rare, medicine) Bone.
  8. Noun.  (rare) A mouth; an opening.
  9. Noun.  In particular, either end of the cervix, internal (to the uterus) or external (to the vagina).

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This entry was last updated on RefTopia from its source on 3/20/2012.