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1. similarity in structure, form, etc., between different animals, plants, or languages
a. the tendency for two substances to combine; chemical attraction
b. a measure of the tendency of a chemical reaction to take place expressed in terms of the free energy change.
3. Biology a measure of the degree of interaction between two molecules, such as an antigen and antibody or a hormone and its receptor
Affinity(religion, spiritualism, and occult)
Astrologers use the term affinity to refer to compatibility between certain planets or signs. It is also used to denote attraction between people whose charts interact harmoniously and magnetically with each other.
The extent to which a substance or functional group can enter into a chemical reaction with a given agent. Also known as chemical affinity.
A specific relationship between data processing elements that requires one to be used with the other, where a choice might otherwise exist.
The strength of the attractive forces between an antigen and an antibody.