Pomponius' Definition of Well-Covers

Notes

1. 19.1.14.prid est quo puteum operitur — A parenthetical clause defining and explaining 'putealia' (well-covers) from the preceding section by Ulpian (D.19.1.13.31). 'quo' is the ablative of means of the relative pronoun, referring back to the implied singular 'puteal' or the concept of 'putealia'. 'operitur' is the passive third-person singular of 'operio' (to cover). 'puteum' (well) is typically a masculine noun ('puteus'), but here it functions either as a neuter nominative subject for the passive verb or as an accusative used as the subject of the passive. The phrase means 'that by which the well is covered'.