The ⚀septcia·lengthel, or ⚀atomical·length
The seventh negative dozenal power of the ⚀lengthel, the ⚀septcia·lengthel (abbreviated ⚀s↓lgℓ) is on the order of the size of a typical atom. As a consequence, a proposed colloquial name for this is the ⚀atomical·length.