A worm of a phylum which includes the planarians together with the parasitic flukes and tapeworms. They are distinguished by having a simple flattened body which lacks blood vessels, and a digestive tract which, if present, has a single opening.
扁虫
Phylum Platyhelminthes: several classes
Example sentencesExamples
Among the earliest hunters, flatworms were simple but effective killing machines.
The cestodes, or tapeworms, differ in a number of ways from other flatworms.
All the ponds hosted parasitic flatworms called trematodes.
Planarians are free-living flatworms, and have a much simpler life history.
The initial studies involved little flatworms called planaria that have a very primitive nervous system.
Definition of flatworm in US English:
flatworm
nounˈflætˌwərmˈflatˌwərm
A worm of a phylum which includes the planarians together with the parasitic flukes and tapeworms. They are distinguished by having a simple flattened body which lacks blood vessels, and a digestive tract which, if present, has a single opening.
扁虫
Phylum Platyhelminthes: several classes
Example sentencesExamples
Among the earliest hunters, flatworms were simple but effective killing machines.
The initial studies involved little flatworms called planaria that have a very primitive nervous system.
The cestodes, or tapeworms, differ in a number of ways from other flatworms.
Planarians are free-living flatworms, and have a much simpler life history.
All the ponds hosted parasitic flatworms called trematodes.