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

(mathematics) The condition of a fractal whose pieces are scaled by different amounts in the x and y directions, so that self-similarity becomes apparent only after an anisotropic transformation.

Exhibiting self-affinity.

(algebraic geometry) A set of points (in n-dimensional space) which satisfy a set of equations which have a polynomial of n variables on one side and a zero on the other side.

(physics) The energy released when an electron is attached to an atom or molecule; used as a measure of its ability to form an anion

(geometry) Said of a set of points in an affine space: the property that the vectors issuing from an arbitrarily chosen point to the rest of the points are linearly independent.

(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.

(mathematical analysis, computing) A model for self-validated numerical analysis in which quantities are represented as affine combinations (called affine forms) of certain primitive variables that stand for sources of uncertainty in data or approximations made during computations.

(geometry, uncountable) The branch of geometry dealing with what can be deduced in Euclidean geometry when the notions of line length and angle size are ignored.

(mathematics) The group of all affine transformations of a finite-dimensional vector space.