valence
noun
va·lence
ˈvā-lən(t)s
1
: the degree of combining power of an element as shown by the number of atomic weights of a monovalent element (such as hydrogen) with which the atomic weight of the element will combine or for which it can be substituted or with which it can be compared
2
a
: relative capacity to unite, react, or interact (as with antigens or a biological substrate)
b
[in part from valence in chemistry, in part borrowed from Late Latin valentia "power, capacity," noun derivative of Latin valent-, valens, present participle of valēre "to have strength, be well" — more at wield]
: the degree of attractiveness an individual, activity, or thing possesses as a behavioral goal
the relative potency of the valences of success and failure—Leon Festinger
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Merriam-Webster unabridged
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