1. a marine invertebrate animal of the class Hydrozoa, including jellyfish, hydroids, and siphonophores
Usage: zoology

1. relating to or characteristic of hydrozoans
Usage: zoology

Examples

• The hydrozoan colony attached itself to the rocky surface.
• Scientists studied the hydrozoan’s life cycle in the laboratory.
• Many hydrozoan species exhibit alternating generations.
• The hydrozoan polyps formed a branching structure.
• Hydrozoan jellyfish are common in coastal waters.
• The researcher identified several hydrozoan characteristics in the specimen.