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: any of various small arthropods and especially insects that frequent damp or wet places: such as
: german cockroach
: water boatman
: any of various large aquatic bugs (family Belostomatidae) with the hind legs flattened and used for swimming
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More Definitions for water bug
: a small insect that lives in or near water
See the full definition for water bug in the English Language Learners Dictionary
: any of various insects that live in or near water or in moist places
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