Definition of octameter in English:

octameter

noun

Prosody
  • A line of verse consisting of eight metrical feet.

    • ‘Really the only difference is that the terms have been Carrollised and the verse is in octameter instead of pentameter.’
    • ‘It is one of the few poems in English to be written in octameter: sixteen-syllable, or eight-stress, lines.’

Pronunciation:

octameter

/äkˈtamədər/