Open English Wordnet
Nouns
(n)determinant, determiner, determinative, determining factor, causal factora determining or causal element or factor“education is an important determinant of one's outlook on life”
(n)antigenic determinant, determinant, epitopethe site on the surface of an antigen molecule to which an antibody attaches itself
Adjectives
(s)deciding, determinant, determinative, determininghaving the power or quality of deciding“cast the deciding vote”, “the determinative (or determinant) battle”