I'm not aware of a circle P having any significance in medicine. It is commonly used as a copyright mark for recording [similar to circle c (C) - copyright, and circle r (R) - registered]. I believe circle p - (P) - is meant to be performance recording copyright or phonograph copyright (or something similar)
Also, (P)i is the symbol for a phosphate group in cellular respiration. The phosphate group is added to ADP to create ATP.
The formula is ADP+ (P)i -> ATP+ H2O
Copyright.
On an electrical schematic, the symbol for a motor is a circle with the letter M inside of it. On an electrical schematic, the symbol for a motor is a circle with the letter M inside of it.
A c with a circle around it is the 'copyright' symbol.
The medical symbol featuring a circle with a plus sign inside is known as the "caduceus." However, it's important to clarify that the true medical symbol is the Rod of Asclepius, which consists of a single serpent entwined around a staff. The caduceus is often mistakenly used in the medical field, but it traditionally represents commerce and negotiation, not medicine. The Rod of Asclepius symbolizes healing and medicine.
It means positive or affirmative in medical abbreviations.
@ - a little letter 'a' in a circle
It's the symbol for anarchy.
It is a big circle with a circle around it
It is the electrical symbol for an Ammeter (a device that measures current).
The most common symbol for the sun is a circle with a dot in the center. This symbol represents the sun's radiant energy and life-giving properties. It is a universal symbol found in various cultures and religions around the world.
It is a ♂. It is an arrow with a circle around it.
Symbol for "registered trademark"