(Encyclopedia) name. Personal identifying names are found in every known culture, and they often pass from one language to another. Hence the occurrence of Native American place names throughout the…
(Encyclopedia) variable star, star that varies, either periodically or irregularly, in the intensity of the light it emits. Other physical changes are usually correlated with the fluctuations in…
(Encyclopedia) parasite, plant or animal that at some stage of its existence obtains its nourishment from another living organism called the host. Parasites may or may not harm the host, but they…
(Encyclopedia) blood transfusion, transfer of blood from one person to another, or from one animal to another of the same species. Transfusions are performed to replace a substantial loss of blood…
(Encyclopedia) transplantation, medical, surgical procedure by which a tissue or organ is removed and replaced by a corresponding part, usually from another part of the body or from another…
(Encyclopedia) forgery, in criminal law, willful fabrication or alteration of a written document with the intent to injure the interests of another in a fraudulent manner. The crime may be committed…
(Encyclopedia) international language, sometimes called universal language, a language intended to be used by people of different linguistic backgrounds to facilitate communication among them and to…
(Encyclopedia) mass extinction, the extinction of a large percentage of the earth's species, opening ecological niches for other species to fill. There have been at least ten such events. The five…
(Encyclopedia) Echo, in Greek mythology, mountain nymph. She assisted Zeus in one of his amorous adventures by distracting Hera with her chatter. For this Hera made her unable to speak except to…
(Encyclopedia) exobiology or astrobiology, search for extraterrestrial life within the solar system and throughout the universe. Philosophical speculation that there might be other worlds similar to…
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