Definition

Noun: A scyphozoan is any member of the class Scyphozoa, a group of marine cnidarians (coelenterates). They are characterized by having a life cycle where the dominant, often free-swimming, stage is the medusa (jellyfish form), which typically has a gelatinous, umbrella-shaped bell.

Usage

The term is used in scientific and zoological contexts to classify and describe true jellyfish. * The large, colorful jellyfish washed ashore was identified as a scyphozoan. * Scyphozoans are distinguished from other jellyfish-like creatures by their life cycle and morphological features.

Advanced Usage

• The class name Scyphozoa is often used in taxonomic classification.
  • The organism was placed within the Scyphozoa based on the structure of its gastrovascular cavity.

Variants and Related Words

• Scyphozoa (noun, plural): The taxonomic class to which scyphozoans belong.
• Scyphistoma (noun): The sedentary polyp stage in the life cycle of a scyphozoan.
• Scyphomedusa (noun): A technical term for the medusa stage of a scyphozoan.

Synonyms

• True jellyfish (common name)
• Jellyfish (common name, though this can include organisms from other classes like Cubozoa)

Different Meanings

The word scyphozoan has a single, specific zoological meaning and is not used idiomatically or in phrasal verbs.

Noun

1. any of various usually free-swimming marine coelenterates having a gelatinous medusoid stage as the dominant phase of its life cycle