Asa, afflicted with some bodily malady, "sought not to the Lord but to the physicians" (2 Chronicles 16:12). The "physicians" were those who "practised heathen arts of magic, disavowing recognized methods of cure, and dissociating the healing art from dependence on the God of Israel. The sin of Asa was not, therefore, in seeking medical advice, as we understand the phrase, but in forgetting Jehovah."

Noah Webster's New International Dictionary of the English Language

1. (n.) A person skilled in physic, or the art of healing; one duty authorized to prescribe remedies for, and treat, diseases; a doctor of medicine.

2. (n.) Hence, figuratively, one who ministers to moral diseases; as, a physician of the soul.