changedvariable

noun
UK /ˈtʃeɪndʒd ˈveəriəbl/
US /ˈtʃeɪndʒd ˈveriəbl/

A changed variable is something in a test that you switch on purpose to see what happens.

The scientist made the plant's water a changed variable to see if it grew taller.


OTHER MEANINGS

2. In math, a letter that stands for a number you can swap out.

In the equation y = x + 2, x is a changed variable when you try new numbers.

3. In coding, a named spot in memory whose value you update while the program runs.

The score is a changed variable that goes up each time you win a point.

4. Anything in daily life that you tweak to get a different outcome.

The amount of sugar was the changed variable in her cookie recipe.