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epilepsy

(Encyclopedia)epilepsy, a chronic disorder of cerebral function characterized by periodic convulsive seizures. There are many conditions that have epileptic seizures. Sudden discharge of excess electrical activity,...

cooking

(Encyclopedia)cooking, the process of using heat to prepare foods for consumption. Many common cooking methods involve the use of oil. Frying is cooking in hot oil; sautéing is cooking in a small amount of oil; st...

fishing

(Encyclopedia)fishing, act of catching fish for consumption or display. Fishing—usually by hand, club, spear, net, and (at least as early as 23,000 years ago) by hook—was known to prehistoric people. It was pra...

poker

(Encyclopedia)poker, card game, believed to have originated in Asia and first played in the United States in the 19th cent. A traditional cutthroat gambling game at first, it is now also an internationally popular ...

prostate cancer

(Encyclopedia)prostate cancer, cancer originating in the prostate gland. Prostate cancer is one of the most common malignancies in men in the United States, second only to skin cancer, and as a cause of cancer deat...

protozoan

(Encyclopedia)protozoan prōˌtəzōˈən [key], informal term for the unicellular heterotrophs of the kingdom Protista. Protozoans comprise a large, diverse assortment of microscopic or near-microscopic organisms ...

spider

(Encyclopedia)spider, organism, mostly terrestrial, of the class Arachnida, order Araneae, with four pairs of legs and a two-part body consisting of a cephalothorax, or prosoma, and an unsegmented abdomen, or opist...

sun, in astronomy

(Encyclopedia)CE5 Structure of the sun sun, intensely hot, self-luminous body of gases at the center of the solar system. Its gravitational attraction maintains the planets, comets, and other bodies of the sola...

herbal medicine

(Encyclopedia)herbal medicine, use of natural plant substances (botanicals) to treat and prevent illness. The practice has existed since prehistoric times and flourishes today as the primary form of medicine for pe...

foundation

(Encyclopedia)foundation, institution through which private wealth is contributed and distributed for public purpose. Foundations have existed since Greek and Roman times, when they honored deities. During the Midd...