Any of various flagellated, usually nonpathogenic protozoa of the genus Giardia that may be parasitic in the intestines of vertebrates including humans and most domestic animals.
Origin of giardiaNew Latin after Alfred Mathieu Giard (1846-1908), French zoologist
- The human intestinal parasite, Giardia lamblia.
From the genus name Giardia
- The human intestinal parasite Giardia lamblia.
- Giardiasis, the disease caused by the parasite.