1. A true bug: large aquatic bug adapted to living in or on the surface of water 
2. Small light-brown cockroach brought to United States from Europe; a common household pest
   - German cockroach, Croton bug, crotonbug, Blattella germanica

Derived forms: water bugs

Type of: cockroach, heteropterous insect, roach

Part of: Blattella, genus Blattella

Encyclopedia: Water bug

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