Master Canadian Nursing Abbreviations Practice

In medical terms, 'OD' stands for 'Once a Day'. The other options, while they may seem plausible, are not correct in the context of medical terminology. 'Optic Density' is a scientific measurement and is not commonly used in medical terminology. 'Over Dose' refers to a toxic amount of a drug or substance and is not used as a medical term on its own. 'Oculus Dexter' is a Latin term meaning 'Right Eye', but it is not typically used in medical abbreviations. Therefore, 'Once a Day' is the correct and most commonly used meaning for 'OD' in medical terminology.