cor·rel·a·tive 
(kə-rĕlə-tĭv)
(kə-rĕlə-tĭv)adj.
1. Related; corresponding.
2. Grammar Indicating a reciprocal or complementary relationship: a correlative conjunction.
n.
1. Either of two correlative entities; a correlate.
2. Grammar A correlative word or expression.
cor·rela·tive·ly adv.