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water beetle

noun
1.
any of various aquatic beetles, as a predaceous diving beetle.
Origin
1660-1670
1660-70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for water beetle
  • Bored with mice and rabbits, she buys a fish tank and installs a water beetle, thinking she might find inspiration for a new work.
  • The round shape of the crawling water beetle makes it difficult for it to swim in fast water.
British Dictionary definitions for water beetle

water beetle

noun
1.
any of various beetles of the families Dysticidae, Hydrophilidae, etc, that live most of the time in freshwater ponds, rivers, etc See whirligig beetle
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for water beetle

any of several thousand species of aquatic beetles (order Coleoptera), including members of the families Haliplidae (crawling water beetles), Amphizoidae (trout-stream beetles), Hygrobiidae (screech beetles), Gyrinidae (whirligig beetles), Noteridae (burrowing water beetles), Hydrophilidae (water scavenger beetles), Dryopidae (long-toed water beetles), and Dytiscidae (true water beetles, also known as diving beetles or predaceous diving beetles). For additional information on groups and species of water beetles, see predaceous diving beetle; water scavenger beetle; whirligig beetle.

Learn more about water beetle with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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