That can take various forms.

plural of variety store

plural of variation selector

(computing, typography) A metacharacter in Unicode that selects one of a set of semantically equivalent glyphs.

(statistics) A collection of statistical models, and their associated procedures, in which the observed variance is partitioned into components due to different explanatory variables.

Variety is what makes life interesting.

A variable whose values are ordered, that can be multiplied by a scalar, and for which the magnitude of differences in values is meaningful.

(logic) A variable that appears in an axiom schema and ranges over formulas, distinguished from the variables of the axiom schema that are quantified over and that range over the individuals of the universe of discourse.

The variable in a scientific experiment that is changed.

plural of varanoid