hydroid

(noun)

any of many colonial coelenterates that exist mainly as a polyp; a hydrozoan

Examples of hydroid in the following topics:

  • Class Cubozoa and Class Hydrozoa

    • Many hydrozoans form colonies that are composed of a branched colony of specialized polyps that share a gastrovascular cavity, such as in the colonial hydroid Obelia.

  • Phylum Cnidaria

    • An example is the colonial hydroid called an Obelia.