octad

From oct- +‎ -ad.

• (Received Pronunciation) IPA^(key): /ˈɒktæd/
• (General American) IPA^(key): /ˈɑkˌtæd/
• Hyphenation: oc‧tad

octad (plural octads)

1. A group of eight things.

   Synonym: octonary

2. (historical) hundred million = myriad myriad; 100,000,000 = 10⁸ [from 16th c.]

• (group) monad, duad/dyad, triad, tetrad, pentad, hexad, hebdomad/heptad, ogdoad/octad, ennead/nonad, decad/decade, hendecad, dodecad/duodecade, chiliad

• octadic
• octad of octads

• octaeteris
• octennium