medical Definition of schistosoma
1
capitalized
: a genus that is the type genus of the family Schistosomatidae and that includes elongated digenetic trematode worms parasitizing the blood vessels of birds and mammals and several forms (as S. haematobium, S. japonicum, and S. mansoni) causing human schistosomiasis
2
: any digenetic trematode worm of the genus Schistosoma : schistosome
