Final answer:
'pc' stands for 'after meals' and is derived from the Latin term 'post cibum'. It's used in medical contexts to instruct when a medication should be taken relative to meal times.
Step-by-step explanation:
The abbreviation "pc" in medical terminology stands for after meals. It is derived from the Latin term "post cibum", which translates to "after meals". This term is commonly used in medical prescriptions and advice to denote when a patient should take a certain medication or perform a particular action relative to their meal times. For example, a doctor may prescribe medication with the instruction to take it "1 tablet pc", meaning the patient should take one tablet after each meal.