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Pronunciation: in-ver'zhun


  1. A turning inward, upside down, or in any direction contrary to the existing one.
  2. Conversion of a disaccharide or polysaccharide by hydrolysis into a monosaccharide; specifically, the hydrolysis of sucrose to d-glucose and d-fructose; so called because of the change in optic rotation.
  3. Alteration of a DNA molecule made by removing a fragment, reversing its orientation, and putting it back into place.
  4. Heat-induced transition of silica, in which the quartz tridymite or cristobalite changes its physical properties as to thermal expansion.
  5. Conversion of a chiral center into its mirror image.

[L. inverto, pp. -versus, to turn upside down, to turn about]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.