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virology

(Encyclopedia)virology, study of viruses and their role in disease. Many viruses, such as animal RNA viruses and viruses that infect bacteria, or bacteriophages, have become useful laboratory tools in genetic studi...

voodoo

(Encyclopedia)voodoo vo͞oˈdo͞o [key] [from the god Vodun], native W African religious beliefs and practices that also has adherents in the New World. Voodoo believers are most numerous in Haiti, where voodoo was...

vampire bat

(Encyclopedia)vampire bat, name for the blood-drinking bats of the family Desmodontidae, found in the New World tropics. Vampire bats feed exclusively on the blood of living animals and are thus the only true paras...

Tasmanian devil

(Encyclopedia)Tasmanian devil, extremely voracious marsupial, or pouched mammal, of the dasyure family, now found only on the island of Tasmania. The Tasmanian devil, Sarcophilus harrisi, formerly found also in Aus...

symbiosis

(Encyclopedia)symbiosis sĭmbēōˈsĭs [key], the habitual living together of organisms of different species. The term is usually restricted to a dependent relationship that is beneficial to both participants (als...

Breytenbach, Breyten

(Encyclopedia)Breytenbach, Breyten brīˈtən brīˈtənbäkh [key], 1939–, South African writer, painter, and activist. Although he is from a distinguished Afrikaner family, he soon became a committed opponent o...

West Nile virus

(Encyclopedia)West Nile virus, microorganism and the infection resulting from it, which typically produces no symptoms or a flulike condition. The virus is a flavivirus and is related to a number of viruses that ca...

bleaching

(Encyclopedia)bleaching, process of whitening by chemicals or by exposure to sun and air, commonly applied to textiles, paper pulp, wheat flour, petroleum products, oils and fats, straw, hair, feathers, and wood. C...

milk, food

(Encyclopedia)milk, liquid secreted by the mammary glands of female mammals as food for their young. The milk of the cow is most widely used by humans, but the milk of the mare, goat, ewe, buffalo, camel, ass, zebr...

lubrication

(Encyclopedia)lubrication, introduction of a substance between the contact surfaces of moving parts to reduce friction and to dissipate heat. A lubricant may be oil, grease, graphite, or any substance—gas, liquid...