Final answer:
The term "bid" in medical prescription indicates that a medication should be taken twice a day.
Step-by-step explanation:
The term "bid" in the context of medication administration stands for 'twice a day'. It is derived from the Latin phrase bis in die, which means that the medicine should be taken two times within a 24-hour period. For instance a patient may be instructed to take a certain medication every 12 hours.