noun
- a small flatworm with a flattened body that lives in freshwater and is known for its ability to regenerate lost body parts
Usage: biology
Examples
- The planarian can regrow its entire head if it is cut off.
- Students observed planarians under the microscope in biology class.
- Planarians are commonly used in regeneration research.
- The planarian glided smoothly across the bottom of the pond.
- Scientists study planarians to understand how tissues regenerate.
- A planarian can be cut into pieces and each piece will grow into a complete worm.