Definition

1. Noun:
   • A taxonomic class of marine annelid worms: "Class Polychaeta" refers to a major class within the phylum Annelida, comprising segmented worms that are predominantly marine. They are characterized by having paired, fleshy appendages (parapodia) on most body segments, which bear numerous bristles called chaetae or setae.

Examples of Usage

• Noun:
  • The intertidal zone is rich with members of the class Polychaeta.
  • Scientists study the class Polychaeta to understand marine biodiversity.

Advanced Usage

• "belonging to the class Polychaeta": used to specify the taxonomic classification of an organism.
  • The fireworm is a notable example of an organism belonging to the class Polychaeta.

Variants and Related Words

• Polychaete (n): An individual worm of the class Polychaeta.
  • The polychaete burrowed into the sandy seabed.
• Polychaetous (adj): Relating to or characteristic of polychaetes.
  • The specimen displayed typical polychaetous features.

Synonyms

• Bristle worms: A common name for polychaetes, referring to their characteristic chaetae.
• Marine annelids: A descriptive term highlighting their habitat and phylum.

Related Phrases

• Polychaete larvae: Refers to the early, often planktonic, life stage of these worms.
  • The polychaete larvae are an important part of the zooplankton.

Noun

1. marine annelid worms