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There is the star (✳), the dot (●), and the x, and sometimes, if it is a variable, it can just be, for example, 180y
Sometimes you can change the first letter of the word and you have a word that rhymes
The Greek letter chi (lower case): χ which is very similar to X except the forward stroke is curved at each end. It is part of unicode, found in Microsoft word and other programs, symbol number 03C7.
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The lines above represent nothing other than invisibility!
A mint mark is a letter or other symbol to indicate where a coin was minted.
X is the symbol for multiplication, as in 2X2=4 X (or any other letter) is often used to represent an unknown quantity.
Usually represent a stream, river, or other body's of water.
Such a symbol is called a "variable". It can be a letter, a group of letters (especially in computer programming), or a letter with a subscript (a lowered number, or some other letter - this is more common in math). The letters need not be from the Latin alphabet; Greek letters, or sometimes Hebrew letters, are also used.
x or any other variable
One explanation I was given was that when a letter was needed to represent current in formulas, C had already been used, and it was decided to use the next unused letter of the alphabet, which was I. However, I prefer the other explanation, which is that in the early days of investigations into electricity, what we now call current was called Intensity, hence the letter I. It should never be confused with Impedence, the symbol for which is Z.
The three letter symbol is given on the basis of its atomic no. whereas the other symbols are given for historical reasons or properties.
It represents a sound which combines with other symbol-sounds to represent oral words - and effective way of communicating in writing.
The sacrament truly bring about what they represent and the sign is a symbol of something
A red rose is a symbol of romantic love. Other colours have different meanings.
on the page with the n symbol, at the top of the palace.
Any letter of the Greek or Roman alphabet, or any other alphabet can be used to represent a variable. There are also non-alpha symbols, for example for the Dirac constant (or reduced Planck constant).