From Longman Dictionary of Contemporary Englishroundwormround‧worm /ˈraʊndwɜːm $ -wɜːrm/ noun [countable] a small round parasite that lives in the bodies of animals and sometimes humans → tapeworm, worm
Examples from the Corpus
roundworm• Signs of a roundworm infection in puppies are likely to be a pot-bellied appearance and poor coat condition. 