Definition of octoploid in US English:

octoploid

(also octaploid)

adjective

Biology
  • Containing eight homologous sets of chromosomes (i.e. four times the diploid complement); made up of somatic cells of this kind.

noun

Biology
  • An octoploid individual, type, or species.

Origin

1920s; earliest use found in American Naturalist. From octo- + -ploid.

Pronunciation

octoploid

/ˈɒktəplɔɪd/