Depending upon which symbol you mean, it usually means that symbol DOUBLED.
The symbol over the é in café is there because the acute accent (accent aigu) indicates pronunciation.
asterisk
If it is the symbol of mercy then logically it will mean mercy.
parallel
If you mean the moto, Veritas is Latin for truth.
The symbol o written above a reaction arrow indicates that the reaction is carried out under an oxygen atmosphere.
The ditto symbol (two floating apostrophes) means that whatever is above the symbol is repeated directly below it.
Sears Roebuck silver
The symbol over the é in café is there because the acute accent (accent aigu) indicates pronunciation.
μ is the symbol for the population mean in statistics. fyi and related but not necessary for the above answer: the sample mean is , enunciated by saying "x" bar. hope this helped. Citation : http://en.wikipedia.org/wiki/Arithmetic_mean
I will assume that you mean " to the power of two ". A symbol for any n-power is to put the number (n) on the side, above the number. Like this: nn.
The above is the symbol of flow meter.
The symbol above the 7 on the keyboard, "&", is an ampersand. It is used in place of the word "and".
Accenture has a logo with a t and a greater than symbol above it.
Trademark. That means that nobody else is allowed to use the Google symbol.
I believe that is the High Beam headlight indicator.
There is no symbol above the number 0 on my phone keyboards. So clearly, it is not a standard.