Noun | 1. | ![]() animal order - the order of animals Actinozoa, Anthozoa, class Actinozoa, class Anthozoa - a large class of sedentary marine coelenterates that includes sea anemones and corals; the medusoid phase is entirely suppressed Alcyonacea, suborder Alcyonacea - comprising the soft corals family Pennatulidae, Pennatulidae - sea pens |