The diameter.
a circle with a diagonal line through it. it looks like = Ø =
An equal sign with a line crossed through it kinda like =\
This is a mathematical symbol meaning "does not equal", as opposed to the usual "equals" sign.
If you mean what does an o with a line over it means, it means that there is emphasis on the o. Such as, Rōb would be pronounced like Robe, not Rob. If you mean how to type it, I just searched what is an o with a line over it? in google, then copy and pasted it onto my document. Hope this helped.
it is a line, and two non connected rays to the first line. Like an x but erase the base of one line. -/-
The symbol is a zero with a diagonal line through it.
The line going through an "o" helps to clarify the letter o, from the number zero.
The circles are actually the letter "O". O is the symbol for Oxygen.
a jewish symbol
You can use w/o. In medical shorthand without is a s with a line over it and with is a c with a line over it
The letter 'O' with a slash through it is the number zero.
The Australian Dollar (AUD) symbol is $. One vertical line through an "S".
Alt+0248 (on number pad) will make the ø. Also, with MS Word: go to Insert> symbol> enter Font: Arial> scroll down to insert this symbol Ø or many others.
angel halo
You can use w/o. In medical shorthand without is a s with a line over it and with is a c with a line over it
A circle with a diagonal line through it is commonly used as a symbol to represent "no" or "not allowed." It is often used in signage to indicate that something is prohibited or unavailable.
I can think of no Greek symbol of a C with one horizontal line through it; but a C with two horizontal lines through it (as in €) is the symbol for the EURO currency as used in Greece and the rest of the Eurozone (including France, Germany, Italy, Holland, Spain, etc).