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football

(Encyclopedia) CE5 A professional football field. College teams use a similar field except that the inbound lines are 53 ft 4 in. (16.25 m) from the sidelines. football, any of a number of games…

O'Casey, Sean

(Encyclopedia) O'Casey, SeanO'Casey, Seanshôn [key], 1884–1964, Irish dramatist, one of the great figures of the Irish literary renaissance. A Protestant, he grew up in the slum district of Dublin…

mite

(Encyclopedia) mite, small, often microscopic arachnid that belongs to several orders in the subclass Acari (or Acarina), to which the tick also belongs; mites and ticks are related to the spiders.…

allergy

(Encyclopedia) allergy, hypersensitive reaction of the body tissues of certain individuals to certain substances that, in similar amounts and circumstances, are innocuous to other persons. Allergens…

gallium

(Encyclopedia) galliumgalliumgălˈēəm [key], metallic chemical element; symbol Ga; at. no. 31; at. wt. 69.723; m.p. 29.78℃; b.p. 2,403℃; sp. gr. 5.904 at 29.6℃ (solid), 6.095 at 29.8℃ (liquid);…

comet

(Encyclopedia) CE5 Comet: Whatever the direction of a comet's flight, its “tail” always points away from the sun. The tail disappears when the comet is far from the sun. comet [Gr.,=longhaired],…

nest

(Encyclopedia) nest, structure for the reception and incubation of the eggs of birds, reptiles, insects, and some fish or for the parturition of mammals, and also for the care of the young during…