Variable
value that can change, usually with a context of an equation or operation
argument of a function
dependent variable
unknown
Tambov constant
parameter
parameter
random element
x
group size
slack variable
categorical variable
degree of freedom
independent variable
free variable
indeterminate
dependent and independent variables
propositional variable
dummy variable
latent variable
exogenous and endogenous variables
observable variable
state variable
assignable variable
free and bound variables