octopod
noun
oc·to·pod ˈäk-tə-ˌpäd 
: any of an order (Octopoda) of cephalopod mollusks (such as an octopus or argonaut) that have eight arms bearing sessile suckers
octopod adjective
Example Sentences
Recent Examples on the Web This 20-foot-long, 15-foot-wide and 10-foot-high octopod will not only be lit up, but its tentacles will move. 
Chris Kaltenbach, baltimoresun.com, 10 Apr. 2018 The deep sea just got a little spookier with the discovery of a ghostly octopod off the Hawaiian archipelago. National Geographic, 4 Mar. 2016
Chris Kaltenbach, baltimoresun.com, 10 Apr. 2018 The deep sea just got a little spookier with the discovery of a ghostly octopod off the Hawaiian archipelago. National Geographic, 4 Mar. 2016 Word History
Etymology
ultimately from Greek oktōpod-, oktōpous scorpion, from oktō- octa- + pod-, pous foot — more at foot
First Known Use
1817, in the meaning defined above