additivity

/ˌædɪˈtɪvəti/
noun
  1. The property of being able to be added together, especially in mathematics or science, where the total effect equals the sum of the individual parts.
    • The economist explained the additivity of costs in the production process.
    • The additivity of the test scores means that each correct answer adds one point to the total.
    • In chemistry, the additivity of volumes allows us to predict the final volume when mixing liquids.
What does "additivity" mean? | whatsthatwordmean | whatsthatwordmean