pre ‧ dic ‧ tor /prɪˈdɪktə $ -ər/ BrE AmE noun [countable]
[ Word Family: noun : ↑ prediction , ↑ predictability ≠ ↑ unpredictability , ↑ predictor ; adjective : ↑ predictable ≠ ↑ unpredictable , ↑ predictive ; verb : ↑ predict ; adverb : ↑ predictably ≠ ↑ unpredictably ]
formal something that shows what will happen in the future
predictor of
High blood pressure is a strong predictor of heart attacks.