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
Recent Examples of flatworm from the Web
There are also ear, eye, nose and throat infections that can occur, and at beaches, skin parasites like flatworm — which causes schistosomiasis, commonly known as swimmer's itch — can be picked up from inland beaches.
A flatworm sent to the International Space Station aboard a SpaceX rocket in 2015 as part of a biological study grew a second head after the first one had been partially amputated before launch.
Flatworms are often sent into space because of their regenerative capabilities, but this particular one (there were both whole and amputated worms sent into space) was able to grow a second head.
Space had permanently altered this flatworm's body plan.
Over the years, the station’s residents have grown zucchini, beheaded flatworms, maneuvered humanoid robots, tended to mouse embryos, watched the muscles of zebrafish atrophy, and drawn their own blood, using their own bodies as test subjects.
The creatures are also are known to host blood flukes—or parasitic flatworms—that can infect endangered loggerhead sea turtles.
Here’s a look at some recent shorts from the island’s scrappy animation scene: Three invertebrates — a water flea, a green hydra (jellyfish-ish) and a planarian flatworm — engage in a food-chain fight after the hydra tries to eat the flea.
But in other animals, extra legs get thrust upon them: In the western U.S., frogs can get polymelia from a flatworm parasite called Ribeiroia ondatrae, which can wreck the amphibian's development.
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.
First Known Use of flatworm
Seen and Heard
What made you want to look up flatworm? Please tell us where you read or heard it (including the quote, if possible).