Ar·gu·lus n. Zool. A genus of copepod Crustacea, parasitic of fishes; a fish louse. See Branchiura.
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Bran·chi·u·ra n. pl. Zool. A group of Entomostraca, with suctorial mouths, including species parasitic on fishes, as the carp lice (Argulus).
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