extremum

/ɪkˈstriːməm/
noun
  1. The highest or lowest value that a mathematical function reaches, either a maximum or a minimum.
    • At the extremum, the slope of the tangent line is zero.
    • The function has an extremum at x equals two, where the graph changes direction.
    • The calculus problem asked us to find the extremum of the curve on the interval.
  2. A point or value that is extreme in a general sense; the highest or lowest point of something.
    • The athlete's performance hit an extremum at the championship game.
    • In the temperature data, the extremum occurred during the heatwave in July.
    • The stock price reached an extremum before dropping sharply.
What does "extremum" mean? | whatsthatwordmean | whatsthatwordmean