DETERMINANT

Definition

1. adjective having the power or quality of deciding. — synonyms: deciding(a), determinative, determining(a)
2. noun a determining or causal element or factor. — synonyms: determiner, determinative, determining_factor, causal_factor
3. noun the site on the surface of an antigen molecule to which an antibody attaches itself. — synonyms: antigenic_determinant, epitope
4. noun a square matrix used to solve simultaneous equations.