A family of parasitic amoebas that live inside the bodies of animals and humans, sometimes causing disease.
From endo- (inside) + amoeba (a single-celled organism) + -idae (taxonomic family suffix). The term emerged in parasitology in the early 20th century to classify amoebas found within host organisms rather than in the environment.
These microscopic parasites were discovered when scientists realized some amoebas weren't just floating around in water—they had actually evolved to live inside human intestines, which is a wild evolutionary strategy that shows how parasites adapt to new homes.
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