The ⚀trina·pentcia·lengthel, or ⚀virinal·length
The ⚀trina·pentcia·lengthel (abbreviated ⚀t•p↓lgℓ) is a quarter of a ⚀luminal·length or a dozenth of an ⚀archaeal·length (about 98.8887d nanometers). This is a approximately the size of a typical virus. As a consequence, a proposed colloquial name for this is the ⚀virinal·length.