Exinimah

Exinimah is equal to \(f_{\psi(\tau[10^{18}])}(10)\). The term was coined by Denis Maksudov.

Etymology
The 3 parts of the name, "exo", "in" and "imah", mean \(10^{18}\), the "in-" operation. So the full name indicates the ordinal index of the number.