A "sandworm" is a fictional creature found in the desert, often depicted as a humongous, worm-like creature with the ability to burrow underground. Full definition
Finally, in the boss level we defeated a giant sandworm by running and jumping on its head. (thekoalition.com)
The colony must be protected from the likes of spores which infect the buildings, giant acid - spewing sandworms, and anything else the planet can throw your way to hinder the survival of the human race. (thexboxhub.com)