Definition

1. Noun:
   • A taxonomic family within the phylum Echinodermata: A scientific classification for a group of related echinoderms, which are marine animals characterized by radial symmetry (usually five-part) and a water vascular system. Examples include starfish, sea urchins, and sea cucumbers.

Usage

• The term is used primarily in scientific, biological, and zoological contexts to categorize and discuss groups of echinoderms.
• It follows standard taxonomic naming conventions, where the family name is typically Latinized and often ends in "-idae".

Examples

• Noun:
  • The Ophiuridae is a well-known echinoderm family containing the brittle stars.
  • Scientists are studying the evolutionary links within this particular echinoderm family.

Advanced Usage

• "to belong to an echinoderm family": to be classified within a specific family of echinoderms.
  • This newly discovered species of sea star appears to belong to the Asteriidae echinoderm family.

Variants and Related Words

• Echinoderm (n): Any member of the phylum Echinodermata.
  • Starfish and sea urchins are both types of echinoderm.
• Echinodermata (n): The phylum name encompassing all echinoderms.
• Family (n, in taxonomy): A principal rank in biological classification below order and above genus.

Synonyms

• Taxonomic family (of echinoderms): A more general term specifying the rank and group.

Related Phrases

• Family of echinoderms: A common descriptive phrase equivalent to "echinoderm family".

Noun

1. a family of echinoderms