Actinomyxidia
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Ac·ti·no·myx·id·i·a
(ak'ti-nō-mik-sid'ē-ă),A sporozoan order with a double cellular envelope, three polar capsules, and eight spores; parasitic chiefly in segmented worms, such as the common earthworm.
[actino- + G. myxa, mucus]