water flea

noun

Definition of water flea 

: any of various small active dark or brightly colored aquatic crustaceans (such as a daphnia or cyclops)

Examples of water flea in a Sentence

Recent Examples on the Web

Peshkin’s own research focuses on the water flea, Latin name Daphnia, an insect barely visible to the naked eye. Karen Weintraub, BostonGlobe.com, "A doctor wages personal and professional battles against aging," 23 June 2018 Peshkin’s own research focuses on the water flea, Latin name Daphnia, an insect barely visible to the naked eye. Karen Weintraub, BostonGlobe.com, "A doctor wages personal and professional battles against aging," 23 June 2018 Peshkin’s own research focuses on the water flea, Latin name Daphnia, an insect barely visible to the naked eye. Karen Weintraub, BostonGlobe.com, "A doctor wages personal and professional battles against aging," 23 June 2018 Peshkin’s own research focuses on the water flea, Latin name Daphnia, an insect barely visible to the naked eye. Karen Weintraub, BostonGlobe.com, "A doctor wages personal and professional battles against aging," 23 June 2018 Peshkin’s own research focuses on the water flea, Latin name Daphnia, an insect barely visible to the naked eye. Karen Weintraub, STAT, "An anti-aging researcher faces the loss of his inspiration: his 96-year-old father," 20 June 2018 Some of the key species of concern are zebra and quagga mussels, Eurasian water milfoil and spiny water fleas. Paul A. Smith, Milwaukee Journal Sentinel, "Smith: Quagga mussels, Eurasian water milfoil, spiny water fleas ... and a catchy tune," 20 June 2018 Rather than the acidity of the water, carbon dioxide itself seems to be affecting the water fleas. Carl Zimmer, New York Times, "Climate Change Is Altering Lakes and Streams, Study Suggests," 11 Jan. 2018 In one such study, Abraham E. Tucker of Southern Arkansas University and his colleagues studied 11 asexual species of water fleas, a tiny kind of invertebrate. Carl Zimmer, New York Times, "This Mutant Crayfish Clones Itself, and It’s Taking Over Europe," 5 Feb. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'water flea.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of water flea

1687, in the meaning defined above

Keep scrolling for more

Learn More about water flea

Share water flea

Statistics for water flea

Last Updated

7 Oct 2018

Look-up Popularity

Time Traveler for water flea

The first known use of water flea was in 1687

See more words from the same year

Keep scrolling for more

More Definitions for water flea

water flea

noun

Kids Definition of water flea

: a tiny often brightly colored freshwater animal related to the crab and lobster

More from Merriam-Webster on water flea

Britannica.com: Encyclopedia article about water flea

Comments on water flea

What made you want to look up water flea? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

lying above or upon

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!