Columbia Encyclopedia

(Encyclopedia) Youth, Isle of, Span. Isla de la Juventud, island and special municipality (1989 est. pop. 71,500), 1,180 sq mi (3,056 sq km), off SW Cuba, from which it is separated by the Batabanó Gulf. Until 1978...

(Encyclopedia) schistosomiasis bĭlˌhärzīˈəsĭs [key], or snail fever, parasitic disease caused by blood flukes, trematode worms of the genus Schistosoma. Three species are human parasites: S. mansoni, S. japon...

(Encyclopedia) sea urchin, spherical-shaped echinoderm with movable spines covering the body. The body wall is a firm, globose shell, or test, made of fused skeletal plates and marked by regularly arranged tubercles...

(Encyclopedia) South Island or Te Waipounamu [Maori,=the waters of greenstone] (1996 pop. 900,114), 58,093 sq mi (150,461 sq km), New Zealand. It is the larger but less populous of the two principal islands of the c...

(Encyclopedia) electric fish, name for various fish that produce electricity by means of organs usually developed from modified muscle tissue. The electric eels of South America are freshwater knifefish unrelated to...

(Encyclopedia) marine biology, study of ocean plants and animals and their ecological relationships. Marine organisms may be classified (according to their mode of life) as nektonic, planktonic, or benthic. Nektonic...

(Encyclopedia) pompano pŏmˈpənō [key], common name for fishes of the genus Trachinotus, members of a large and important family (Carangidae) of mackerellike fishes, abundant in warm seas around the world. They h...

(Encyclopedia) Osage ōˈsāj, ōsājˈ [key], indigenous people of North America whose language belongs to the Siouan branch of the Hokan-Siouan linguistic stock (see Native American languages). In prehistoric time...

(Encyclopedia) motorboating, sport of navigating a motor-powered vessel on the water. It is done on either fresh- or saltwater and may be competitive or recreational. The first successful motorboat traveled (1887) a...

(Encyclopedia) British Indian Ocean Territory, archipelago, c.1,180 mi (1,900 km), NE of Mauritius, in the central Indian Ocean. The more than 50 islands, which form the Chagos Archipelago and are located on the sou...