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amusement park

(Encyclopedia)amusement park, a commercially operated park offering various forms of entertainment, such as arcade games, carousels, roller coasters, and performers, as well as food, drink, and souvenirs. Amusement...

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...

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,...

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...

university press

(Encyclopedia)university press, publishing house associated with a university and nearly always bearing the university's name in its imprint. The university press is normally a specialized publishing house emphasiz...

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...