Mathematics. an algebraic expression of the sum of products of elements, each with an appropriate algebraic sign, usually written in a square array and used in the solution of systems of linear equations.

Also called antigenic determinant, epitope. Immunology. any site on an antigen molecule at which an antibody can bind, the chemical structure of the site determining the specific combining antibody.

GeneticsArchaic. a gene.

Origin of determinant

1600–10; < Latindēterminant- (stem of dētermināns), present participle of dētermināre. See determine, -ant

a factor, circumstance, etc, that influences or determines

mathsa square array of elements that represents the sum of certain products of these elements, used to solve simultaneous equations, in vector studies, etcCompare matrix (def. 9)