inflection point

noun Mathematics.
a point on a curve at which the curvature changes from convex to concave or vice versa.
Also called flex point, point of inflection.


Origin:
1715–25

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Inflection point is always a great word to know.
So is quincunx. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
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Example sentences
We are at a historic inflection point in cancer care and research.
However, they now find themselves at another inflection point, having to choose between the hardware space or something new.
Then the slope rises ever more steeply as bacteria proliferate until it reaches an inflection point.
There's usually an inflection point--an age at which the number of breakdowns starts to rise dramatically.
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