fractionally

/ˈfrækʃənəli/
adverb
  1. By a very small amount; to a tiny degree.
    • She beat her personal record by fractionally less than a second.
    • The new design is fractionally more efficient than the old one.
    • The temperature dropped fractionally overnight, but it was still warm.
What does "fractionally" mean? | whatsthatwordmean | whatsthatwordmean