IPA: /ˈɒk.tæd/
KK: /ˈɑkˌtæd/
A group or sequence that consists of eight items or elements.
The team was divided into an octad for the project.
Octad → It is formed from "octa-" (from Greek "okto", meaning eight) and "-ad" (a suffix used in forming nouns). The word "octad" refers to a group or set of eight items.
Think of the Greek word for eight, 'okto', to remember that an 'octad' is a collection of eight.