Threads a function over corresponding list elements.
Thread[f[args]]
Thread[f[args], h]
Thread[f[args], h, n]
Thread[f[{a, b}, {x, y}]]
→ {f[a, x], f[b, y]}Thread[Plus[{1, 2}, {3, 4}]]
→ {4, 6}Thread[g[{a, b, c}, {1, 2, 3}]]
→ {g[a, 1], g[b, 2], g[c, 3]}