coelenterates

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• coelenterates — n. (Zoology) member of the phylum Coelenterata (class of aquatic invertebrates which includes jellyfishes, sea anemones, corals, etc.) …   English contemporary dictionary

• animal — animalic /an euh mal ik/, animalian /an euh may lee euhn, mayl yeuhn/, adj. /an euh meuhl/, n. 1. any member of the kingdom Animalia, comprising multicellular organisms that have a well defined shape and usually limited growth, can move… …   Universalium

• reproductive system, animal — Introduction       any of the organ systems by which animals reproduce.       The role of reproduction is to provide for the continued existence of a species; it is the process by which living organisms duplicate themselves. Animals compete with… …   Universalium

• skeleton — skeletonless, adj. skeletonlike, adj. /skel i tn/, n. 1. Anat., Zool. the bones of a human or an animal considered as a whole, together forming the framework of the body. 2. any of various structures forming a rigid framework in an invertebrate.… …   Universalium

• reproduction — /ree preuh duk sheuhn/, n. 1. the act or process of reproducing. 2. the state of being reproduced. 3. something made by reproducing an original; copy; duplicate: a photographic reproduction; a reproduction of a Roman vase. 4. Biol. the natural… …   Universalium

• animal development — Introduction  the processes that lead eventually to the formation of a new animal starting from cells derived from one or more parent individuals. Development thus occurs following the process by which a new generation of organisms is produced by …   Universalium

• Social behaviour in animals — Introduction       actions of animals living in communities. Such behaviour may include the feeding of the young, the building of shelters, or the guarding of territory. General characteristics       Social behaviour (Social behaviour in animals) …   Universalium

• phylogeny — phylogenetic /fuy leuh jeuh net ik/, phylogenetical, phylogenic, adj. phylogenetically, adv. phylogenist, n. /fuy loj euh nee/, n. 1. the development or evolution of a particular group of organisms. 2. the evolutionary history of a group of… …   Universalium

• regeneration — /ri jen euh ray sheuhn/, n. 1. act of regenerating; state of being regenerated. 2. Electronics. a feedback process in which energy from the output of an amplifier is fed back to the grid circuit to reinforce the input. 3. Biol. the restoration or …   Universalium

• feeding behaviour — Any action of an animal directed toward obtaining nutrients. Each species evolves methods of searching for, obtaining, and ingesting food for which it can successfully compete. Some species eat only one type of food, others a variety. Among… …   Universalium

• nematocyst — A stinging cell of coelenterates consisting of a poison sac and a coiled barbed sting capable of being ejected and penetrating the skin of an animal on contact; of considerable consequence in large jellyfish and in the Portuguese man of war whose …   Medical dictionary