function, mathematical function - a mathematical relation such that each element of one set is associated with at least one element of another set

isometry - a one-to-one mapping of one metric space into another metric space that preserves the distances between each pair of points; "the isometries of the cube"

procedure, process - a particular course of action intended to achieve a result; "the procedure of obtaining a driver's license"; "it was a process of trial and error"

genetic science, genetics - the branch of biology that studies heredity and variation in organisms