oc·tam·e·ter /ɑkˈtæmətɚ/
  八步格
  Oc·tam·e·ter n.  Pros. A verse containing eight feet; as, --
     Deep˝ in|to˝ the | dark˝ness | peer˝ing, | long˝ I | stood˝ there | wond'˝ring, | fear˝ing.   --Poe.
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  octameter
       n : a verse line having eight metrical feet