cryp·to·spor·id·i·um 
(krĭp′tō-spə-rĭdē-əm)
(krĭp′tō-spə-rĭdē-əm)n.
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.
[New Latin Cryptosporidium, genus name : CRYPT(O)- + SPOR(O)- + Latin -idium, diminutive suff. (from Greek -idion).]
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