Is a wood louse a mollusk?

No, a wood louse is not a mollusk; it is an terrestrial crustacean belonging to the order Isopoda. Wood lice are more closely related to shrimp and crabs than to mollusks, which include animals like snails and clams. They have a segmented body and exoskeleton typical of arthropods, while mollusks have a soft body, often with a hard shell.