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1. similarity in structure, form, etc., between different animals, plants, or languages
2. Chem
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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


(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 Astrology Book, Second Edition © 2003 Visible Ink Press®. All rights reserved.


The extent to which a substance or functional group can enter into a chemical reaction with a given agent. Also known as chemical affinity.
(computer science)
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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The antibody affinity maturation adopts the newly developed proprietary DNA mutagenesis technique, which is capable of creating an enormous number (e.g.
Germinal center-independent affinity maturation in tumor necrosis factor receptor 1-deficient mice.
Thus, it is to be expected that relevant antibodies had sufficient time to affinity maturation. Whereas in chronic infection, such as by Toxocara or Toxoplasma, the continuous contact with antigens facilitates affinity maturation [18, 23], there remains however the question about the source of antigen or allergen for affinity maturation in the case of rarely occurring acute episodes of parasitism such as by A.
These clonal selection based algorithms essentially evolve solutions by repeated process of cloning, affinity maturation (via mutation) and selection for candidate solutions, and remaining good solutions in the population.
Hypermutation combined with clonal expansion is an adaptive process known as affinity maturation (Berek & Ziegner, 1993).
Affinity maturation of phage display antibody populations using ribosome display.
Affinity maturation refers to the process whereby better antibodies persist that have a higher affinity for the vaccine antigen as time goes by after vaccination because as antigen becomes more scarce, the higher affinity antibodies outcompete the lower affinity antibodies--and that is good.