Octocerata \Oc`to*cer"a*ta\, n.pl. [NL., fr. Gr.? eight + ?, a horn.]

(Zo["o]l.) A suborder of Cephalopoda including Octopus, Argonauta, and allied genera, having eight arms around the head; -- called also Octopoda.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Octopoda \Oc*top"o*da\, n.pl. [NL.]

(Zo["o]l.)
   (a) Same as Octocerata.
   (b) Same as Arachnida.

Source: Webster's Revised Unabridged Dictionary (1913)