(chemistry, obsolete) The tendency of a substance to combine with some specific substances more readily than others. / (dated) The feeling of being attracted to or sympathetic with someone or something.

(linear algebra) A linear combination (of vectors in Euclidean space) in which the coefficients all add up to one.

plural of chemical affinity

(rare) A co-in-law: A relationship by marriage with a separation by three degrees (two people), compared to prototypical affines, where the separation is two and one.

Fraud whose victims are susceptible because they trust the perpetrator as a member of their circle.

plural of affinity card

plural of electron affinity

plural of affine geometry

(differential geometry) A type of differential geometry in which the differential invariants studied are invariant under volume-preserving affine transformations.