segmented worm
Definition
Noun: A type of worm characterized by a body divided into a series of repeating, similar segments both internally and externally. This segmentation is a fundamental anatomical feature.
Usage
The term "segmented worm" is a common name used in biology and zoology to refer to worms belonging to the phylum Annelida. It is a descriptive, non-technical term that highlights their most visible physical characteristic.
Examples
- The earthworm is a familiar example of a segmented worm.
- Under the microscope, you can clearly see the body of the segmented worm divided into numerous rings.
- Marine biologists study polychaetes, which are a class of segmented worms.
Advanced Usage
- In scientific classification, the term "segmented worm" is synonymous with "annelid." The formal phylum name is Annelida.
- The segmentation (metamerism) of these worms allows for specialized functions in different body segments and provides flexibility.
Variants and Related Words
- Annelid (noun): The formal scientific term for a segmented worm.
- Leeches and earthworms are both annelids.
- Annelida (noun): The phylum to which all segmented worms belong.
Synonyms
- Annelid: The direct scientific synonym.
- Ringed worm: Another informal descriptive term, though less common.
Related Phrases/Idioms
(Not commonly used in idiomatic expressions. The term is primarily scientific/descriptive.)
Noun
-
worms with cylindrical bodies segmented both internally and externally
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