flatworm
Definition
Noun: 1. A type of worm belonging to the phylum Platyhelminthes, characterized by a soft, flattened, unsegmented body. They can be free-living (e.g., planarians) or parasitic (e.g., tapeworms, flukes).
Usage
The word "flatworm" is a common name used in biology and zoology to describe a specific group of invertebrates. It is typically used in scientific, educational, and general descriptive contexts.
Examples
- The biology class studied a flatworm under the microscope to observe its simple anatomy.
- Tapeworms, a type of parasitic flatworm, can infect the intestines of vertebrates.
- The planarian is a free-living flatworm known for its remarkable ability to regenerate.
Advanced Usage
- The term is often used in contrast to other worm phyla like Nematoda (roundworms) or Annelida (segmented worms), emphasizing the flat, ribbon-like body shape.
- In ecological studies, the presence of certain free-living flatworms can be an indicator of water quality.
Variants and Related Words
- Platyhelminth (n): The formal scientific name for a flatworm.
- Trematode (n): A class of parasitic flatworms, commonly known as flukes.
- Cestode (n): A class of parasitic flatworms, commonly known as tapeworms.
- Turbellarian (n): A class of primarily free-living flatworms, such as planarians.
Synonyms
- Platyhelminth (scientific synonym)
Different Meanings
The word "flatworm" does not have significantly different common meanings. Its primary and almost exclusive use is to refer to the biological group described above.
Noun
-
parasitic or free-living worms having a flattened body
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