pi is a symbol that we all use and it looks something like this....
There is no intrinsic difference. Either can be named using the names of any two points on them, or using any letter or symbol of any alphabet - including symbols that you have made up.
To "represent" something or someone IS a symbol's purpose. To empower the wielder of the symbol with what the symbol represents.
a symbol that means there is more than enough of something
The verb of symbol is symbolise. As in "to symbolise something".
because of something
The process of naming something is called "naming" or "designation." It involves giving a specific label or title to identify and refer to a person, object, or concept.
symbol
The rules for naming chemical elements and for chemical symbols are established by IUPAC; see this link.
Do you know what you will be naming the baby?
i.e.
To indicate something you don't understand
A symbol is something used to describe a group of something
A carotid is a symbol use to indicate where something is to be inserted into text. If a persson is texting and made a .iztake in what they typed they would use tytge cqaret symbol and then the correction to indiccate that it should have been that instead.
In literature, a symbol is something that stands for something else. An author could use a symbol to make a more generalized statement about mankind, or perhaps to foreshadow a later event in the work.
i.e. "Apex"
pi is a symbol that we all use and it looks something like this....