Source : Webster's Revised Unabridged Dictionary (1913)

Octameter \Oc*tam"e*ter\, n. [Cf.L. octameter in eight feet. See
   {Octa-}, and {meter}.] (Pros.)
   A verse containing eight feet; as,

         Deep" in|to" the | dark"ness | peer"ing, | long" I |
         stood" there | wond'"ring, | fear"ing.   --Poe.

Source : WordNet®

octameter
     n : a verse line having eight metrical feet