thixotropy

/θɪkˈsɒtrəpi/
noun
  1. The property of a substance that causes it to become less thick and flow more easily when shaken, stirred, or otherwise disturbed, and then thicken again when left still.
    • Scientists study thixotropy to improve the texture of cosmetics and paints.
    • The thixotropy of the drilling fluid helps prevent accidents during oil extraction.
    • Thixotropy is important in making ketchup that pours easily after shaking.