noun ar·gu·lus \ˈärgyələs\

Definition of argulus

  1. 1 capitalized :  a common genus of fish lice including forms highly destructive to goldfish and related forms

  2. 2 plural arguli \-ˌlī\ :  a fish louse of the genus Argulus :  carp louse

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Origin and Etymology of argulus

New Latin, from Argus, mythological being + New Latin -ulus — more at argus

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