What does a circle with a "P" inside it mean in medical termonology?

Question:What does this mean? Its like the copyright symbol, but with a "P." Does this mean the doctor has signed off or does this mean something else??

Answers:
I think that it means that something has been patented.

What is the word when you're trying to prove yourself?

What question must we ask to get this answer below ?

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Word Jumbles?

904-words-wordplay-3.html

What is the word to describe a person who owns books but does not read them?

Whats a "JD"?

Can you come up with a grammatically sentence that has 5 consecutive occurrences of the word AND?