Source : Webster's Revised Unabridged Dictionary (1913)

Octopod \Oc"to*pod\, n. [Gr. ? eight-footed; ? eight + ?, ?,
   foot: cf.F. octopode.] (Zo["o]l.)
   One of the Octocerata.

Source : WordNet®

octopod
     n : eight-armed cephalopod lacking an internal shell