1. causal factor, determinant, determinative, determiner, determining factor

a determining or causal element or factor

Example Sentences:
'education is an important determinant of one's outlook on life'

• causal factor
• determinative
• determiner
• determining factor

2. antigenic determinant, determinant, epitope

the site on the surface of an antigen molecule to which an antibody attaches itself

• antigenic determinant
• epitope

3. determinant

a square matrix used to solve simultaneous equations

4. deciding, determinant, determinative, determining

having the power or quality of deciding

Example Sentences:
'the crucial experiment'
'cast the deciding vote'
'the determinative (or determinant) battle'

• deciding
• determinative
• determining