- any marine coelenterate of the class Anthozoa, comprising colonial and solitary polyps and including corals, sea anemones, sea pens, etc.
- Also an·tho·zo·ic. belonging or pertaining to the anthozoans.
- any of the solitary or colonial sessile marine coelenterates of the class Anthozoa, including the corals, sea anemones, and sea pens, in which the body is in the form of a polyp
- Also: actinozoan of or relating to the class Anthozoa