rockhopper

== English == === Etymology === From rock +‎ hopper. === Pronunciation === === Noun === rockhopper (plural rockhoppers) A rockhopper penguin (Eudyptes spp.). Any of the order Archaeognatha of jumping bristletails. (fishing) A disk on the bottom of a trawler-net that lifts when it hits a rock or bump, raising the net, preventing damage to the net or the seafloor.