• A concentrated fluid of poisonous and biologically active substances secreted by a variety of animals that can be injected or in some other way introduced into another animal or human, usually by a bite or a sting.
  NCI Thesaurus
  U.S. National Cancer Institute, 2021
• Poisonous animal secretions forming fluid mixtures of many different enzymes, toxins, and other substances. These substances are produced in specialized glands and secreted through specialized delivery systems (nematocysts, spines, fangs, etc.) for disabling prey or predator.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2021
• Venom, the poisonous secretion of an animal, produced by specialized glands that are often associated with spines, teeth, stings, or other piercing devices. The venom apparatus may be primarily for killing or paralyzing prey or may be a purely defensive adaptation. Some venoms also function as...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2020