Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia, Wikipedia.
Related to association constant: dissociation constant
1. in experimental immunology, a mathematical expression of hapten-antibody interaction: average association constant, K = [hapten-bound antibody]/[free antibody][free hapten];
2. the equilibrium constant involved in the association of two or more compounds or ions into a new compound; the reciprocal of the dissociation constant.
Synonym(s): binding constant