Definition of zebra mussel
: a chiefly freshwater Eurasian lamellibranch mollusk (Dreissena polymorpha) that was accidentally introduced into the Great Lakes and has spread to other waterways where it colonizes and clogs water intake pipes and competes with native fish for food
First Known Use of zebra mussel
Learn More about zebra mussel
Britannica.com: Encyclopedia article about zebra mussel
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