flatworm

noun
flat·worm | \ ˈflat-ˌwərm \

Definition of flatworm 

: any of a phylum (Platyhelminthes) of soft-bodied usually much flattened acoelomate worms (such as the planarians, flukes, and tapeworms)

called also platyhelminth

Examples of flatworm in a Sentence

Recent Examples on the Web

After years ofd scattered claims, scientists have confirmed that the nation is indeed infested with hammerhead flatworms and has been for nearly two decades. David Grossman, Popular Mechanics, "Scientists Discover Giant Worms Invaded France Almost 20 Years Ago," 23 May 2018 The parasite, the lancet liver fluke, is a flatworm that jumps between different animal species to complete its life cycle. Laura Yan, Popular Mechanics, "These Brain Worms Turn Ants Into Death-Seeking Zombies," 10 June 2018 But as Ben Guarino reports for the Washington Post, these voracious flatworms have been stealthily making their way through France for the past two decades, evading scientists’ attention until recently. Brigit Katz, Smithsonian, "Hammerhead Flatworms Have Been Quietly Invading France for Two Decades," 26 May 2018 Just as hammerhead sharks cruise through lagoons, hammerhead flatworms hunt through soil. Ben Guarino, BostonGlobe.com, "Giant predatory worms invaded France, but scientists just noticed them," 22 May 2018 All told, these citizen scientists made 111 observations of large flatworms between 1999 and 2017. Ben Guarino, BostonGlobe.com, "Giant predatory worms invaded France, but scientists just noticed them," 22 May 2018 Glanzman said one of McConnell’s students, Al Jacobson, demonstrated the transfer of memories between flatworms via RNA injections, coincidentally while an assistant professor at UCLA. Usha Lee Mcfarling, STAT, "Memory transferred between snails, challenging standard theory of how the brain remembers," 14 May 2018 Justine and his colleagues do not yet know how the influx of hammerhead flatworms is impacting France’s soils. Brigit Katz, Smithsonian, "Hammerhead Flatworms Have Been Quietly Invading France for Two Decades," 26 May 2018 Measuring more than 1 foot in length and sometimes as much as 18 inches, the flatworms have heads similar to hammerhead sharks, the study noted. Chris Ciaccia, Fox News, "Massive 18-inch hammerhead worms are invading France," 23 May 2018

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

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First Known Use of flatworm

1874, in the meaning defined above

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Last Updated

7 Aug 2018

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The first known use of flatworm was in 1874

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More Definitions for flatworm

flatworm

noun
flat·worm | \ ˈflat-ˌwərm \

Medical Definition of flatworm 

: any worm of the phylum Platyhelminthes : platyhelminth especially : turbellarian

More from Merriam-Webster on flatworm

See words that rhyme with flatworm

Britannica.com: Encyclopedia article about flatworm

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occurring twice a year or every two years

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