any sporozoan of the order Coccidia, often parasitic in the digestive tracts of certain animals and a cause of coccidiosis.
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How to use coccidium in a sentence
But in many cases Coccidia are found in other organs, to which they are doubtless carried by lymphatic or circulatory channels.
That coccidia are not always killed by exposure to the sun is shown by their survival on the sites of old chicken yards.Our Vanishing Wild Life | William T. Hornaday
For this reason he regards them as Gregarines rather than Coccidia.