Which ear is referred to by the abbreviation "OS"?

The abbreviation "OS" stands for "oculus sinister," which is a Latin term that translates to "left eye." However, in veterinary and medical terminology, the similar abbreviation for the left ear is also "AS," which stands for "auris sinistra." Thus, "OS" is most commonly associated with the left ear in the context of veterinary medicine, especially when used alongside the abbreviation "OD," meaning the right eye or ear (oculus dexter).

Understanding these abbreviations is essential for accurately interpreting veterinary medical records and instructions, where clear communication is key. The context and specific terminology used in veterinary medicine often distinguish the abbreviations for eyes and ears, which is pivotal in ensuring proper care and management of patients.