As·ca·rid·ia .as-kə-'rid-ē-ə n a genus of nematode worms of the family Ascaridae that include an important intestinal parasite (A. galli) of some domestic fowl and esp. the chicken and that are distinguished from other ascarids by the presence of a preanal sucker
* * *
As·ca·rid·ia (as″kə-ridґe-ə) a genus of nematode parasites of the superfamily Ascaridoidea. A. galґli is parasitic in the large intestines of chickens and other birds, causing enteritis and diarrhea. A. lineaґta is a common roundworm parasitizing the small intestines of birds in the United States.Medical dictionary. 2011.