Definition of octad in English:

octad

noun

technical
  • A group or set of eight.

    • ‘After meiosis, the four meiotic products undergo an additional mitotic division to yield eight haploid nuclei, which differentiate into an octad of eight ascospores.’
    • ‘In this case, the first postmeiotic cells deriving from the spores have been separated to yield octads composed of four pairs of colonies deriving from a single meiosis.’
    • ‘In these cases, molecular analysis was performed on only four members of the octad.’

Origin

Mid 19th century: via late Latin from Greek oktas, oktad-, from oktō eight.

Pronunciation:

octad

/ˈäktad/