noun.
A protozoan of the genus Cryptosporidium that is an intestinal parasite in humans and other vertebrates and sometimes causes diarrhea that is especially severe in immunocompromised people.
noun.
A protozoan, of the genusCryptosporidium, that is an intestinalparasite of humans and other vertebrates; can cause diarrhea and other symptoms in cases of low immunity.
Word Usage
"So is an intestinal parasite called cryptosporidium, which can be fatal in some cases."