Definition of coccidia in US English:


plural noun

  • Parasitic protozoa of a group that includes those that cause diseases such as coccidiosis and toxoplasmosis.

    Suborder Eimeriorina (formerly order or subclass Coccidia), phylum Sporozoa

    • ‘I tested these hypotheses experimentally in a host-parasite system involving wild turkeys and their intestinal protozoal parasites, the eimerian coccidia.’
    • ‘We tested whether male finches with experimentally elevated testosterone would be more likely to harbor coccidia, protozoan parasites that may cause coccidiosis.’
    • ‘We used fecal egg counts to measure intensity of infection by T. tenuis worms and coccidia.’
    • ‘Drug-resistant coccidia parasites are on the rise, reducing the effectiveness of antibiotics.’
    • ‘We added the chemical to the drinking water during the pretreatment period to prevent the spread of coccidia, a common endoparasite of house finches.’


Mid 19th century: from modern Latin (former order name), from Greek kokkis, diminutive of kokkos ‘berry’.