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Pronunciation: e-kwiv'a-lens, -len-se


  1. The property of an element or radical of combining with or displacing, in definite and fixed proportion, another element or radical in a compound.
  2. The point in a precipitin test at which antibody and antigen are present in optimal proportions.

[L. aequus, equal, + valentia, strength (valence)]

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