https://www.loc.gov/resource/gdcwdl.wdl_18198/?sp=7
The most excellent labor of The Elements by Euclid of Megara arranged together with the most sharp-sighted Campanus on the art of geometry happily begins:
A point is that of which nothing is a part.
But the most fantastic thing on the entire first page is the abbreviated form of ūnīuscuiusque; the genitive masculine/feminine/neuter singular form of ūnusquisque.
https://en.wiktionary.org/wiki/unusquisque#Latin
It should be noted that the genitive masculine/feminine/neuter plural forms are, apparently, ūnōrumquōrumque, ūnārumquārumque, and ūnōrumquōrumque, respectively.
ivlia sē animadvertit
Tīrō Ōrātiōnis