superlinear
/ˌsuːpəˈlɪnɪə/ /ˌsjuːpəˈlɪnɪə/adjective
1 Mathematics. Involving a power greater than one; of an order greater than one.
2Chiefly Textual Criticism. Written above the line of the text.
Origin
Late 18th century (in an earlier sense). From super- + linear.