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Definition of COPEPODA
: a subclass of Crustacea comprising minute aquatic forms abundant in both fresh and salt waters and including one order (Eucopepoda) whose members are chiefly free-living and important as fish food and another order (Branchiura) whose members are parasitic on the skin and gills of fish
—co·pe·pod\ˈkō-pə-ˌpäd\noun or adjective
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