A Symbol
The latin letter a is used to represent a variable or coefficient.
Symbol  Format  Data 

a  Unicode 

TeX 


SVG 
Usage
A coeffecient is a constant value in a math expression that is given a symbol to represent it instead of a value.
A variable is a core concept in algebra where a symbol, usualy a lower case latin letter, is used as a placeholder in a math expression.
The Latin Alphabet is a collection of 26 symbols that form the basis of the English language. The alphabet's symbols are used throughout mathematics to represent variables, constants, and coeffecients.
Related Symbols
The capital Latin letter A is used in mathematics as a variable. In linear algebra the symbol is used to represent a matrix. In probability the symbol is used to represent a random variable. The symbol also appears in various formulas.