Ogdoos marks something as occupying the eighth position, whether a day, an item in a sequence, or an identified figure.

The term marks an eighth position in a sequence: it identifies the day of circumcision, successive items in an ordered list, and a figure described in relation to seven others.

1. Position as eighth in a sequence · dominant

   In Acts 7:8 and Luke 1:59, the dative feminine form occurs in the clause concerning circumcision on a specified day; the APB renders this as “on the eighth day.” In Revelation 17:11, the nominative masculine form identifies the wild animal in relation to seven others, while Revelation 21:20 places beryl after the seventh item in a listed sequence. The accusative masculine form in 2 Peter 2:5 occurs with Noah, though the APB does not make the term's specific contribution explicit.

   Acts 7:8Luke 1:59Revelation 17:11Revelation 21:202 Peter 2:5

In the Anselm Project Bible: The APB explicitly uses “eighth” for the day in Acts 7:8 and Luke 1:59, for the wild animal in Revelation 17:11, and for beryl in Revelation 21:20. In 2 Peter 2:5, its translation does not visibly reflect the term.