Involving one variable, as opposed to two (bivariate) or many (multivariate).
Univariate
See also
Bivariate, Multivariate, Univariate Function, Univariate Polynomial, VariateExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Univariate." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Univariate.html