variable
n. countablen. a factor or condition that can change and affect the result of something. In science or math, it is the part of an experiment that you measure or control.
n. an element, feature, or factor that is liable to vary or change. In mathematical and scientific contexts, it refers to a symbol or quantity that can represent any value in a set.
The weather is a major variable in our travel plans.
Researchers must control every variable except for the one they are testing to ensure the results are accurate.
Economists struggle to predict market shifts because there are too many independent variables acting simultaneously, from consumer confidence to international trade policy.
Borrowed into Middle English in the 14th century from Old French variable, from Latin variare (“to change”), from varius (“different, various”). Equates to English vary + -able.
Often used with the adjectives 'independent' or 'dependent' in scientific contexts.