coracidium

cor·a·cid·i·um

(kor'ă-sid'ē-ŭm),
The ciliated first-stage aquatic embryo of pseudophyllid and other cestodes with aquatic cycles; within the ciliated embryophore is a hooked larva, the hexacanth, which develops in the intermediate host, usually an aquatic crustacean, into the next larval stage, the procercoid.

coracidium

/cor·a·cid·i·um/ (kor″ah-sid´e-um) pl. coraci´dia   [L.] the individual free-swimming or free-crawling, spherical, ciliated embryo of certain tapeworms, e.g., Diphyllobothrium latum.

coracidium

first larval stage of a pseudophyllidean cestode; this motile stage consists of a ciliated embryophore containing the oncosphere.
References in periodicals archive ?
The coracidium of the cestode Tylocephalum and the migration and late of this parasite in the American oyster, Crassostrea virginica.