-dex

-dex is a suffix used by (1) André Joyce for the operand 510, a verbalized Roman numeral DX, as in the number name (arithmonym), googodex = g(2, 1020, 510) and (2) Saibain for the operation on n, g(2, 100, g(3, n, 10)) = ((\^n}10)^{100}\) as in.