Hektintar

Hektintar is equal to \(f_{\underbrace{C(C(\cdots(C(C(\Omega_{100}2,0),0),\cdots ),0)}_{99\text{-intar C's}}}(99\text{-intar}\) using the fast-growing hierarchy with fundamental sequences for Taranovsky notation. The term was coined by wiki user Denis Maksudov.

Etymology
The 3 parts of the name, "hekto", "in" and "tar", mean 100 and Tar function (from Taranovsky's notation) respectively, which form \(Tar(100)\) when concatenated backwards. So the full name indicates how the number is constructed.