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Caroline Islands

(Encyclopedia)Caroline Islands, archipelago, c.830 sq mi (2,150 sq km), W Pacific, just north of the equator. The largest islands are Palau (Belau), Yap, Chuuk (Truk), Pohnpei (Ponape), and Kosrae. The islands are ...

capillarity

(Encyclopedia)CE5 Capillarity: Water wets the walls of a capillary tube and thus rises, causing the upper surface, or meniscus, of the liquid to be concave; mercury does not wet the walls of a capillary tube and...

whooping cough

(Encyclopedia)whooping cough or pertussis, highly communicable infectious disease caused by the bacterium Bordetella pertussis. The early or catarrhal stage of whooping cough is manifested by the usual symptoms of ...

ruthenium

(Encyclopedia)ruthenium ro͞othēˈnēəm [key], metallic chemical element; symbol Ru; at. no. 44; at. wt. 101.07; m.p. about 2,310℃; b.p. about 3,900℃; sp. gr. 12.41 at 20℃; valence commonly +2, +3, +4, +6, ...

quarantine

(Encyclopedia)quarantine kwŏrˈəntēn [key], isolation of persons, animals, places, and effects that carry or are suspected of harboring communicable disease. The term originally referred to the 40 days of offsho...

Semite

(Encyclopedia)Semite sĕmˈīt, sēˈmīt [key], originally one of a people believed to be descended from Shem, son of Noah. Later the term came to include the following peoples: Arabs; the Akkadians of ancient Bab...

Siqueiros, David Alfaro

(Encyclopedia)Siqueiros, David Alfaro dävēᵺˈ älfäˈrō sēkāˈrōs [key], 1896–1974, Mexican painter, b. Chihuahua. Siqueiros was among Mexico's most original and eminent painters. His career as an artist...

platinum

(Encyclopedia)platinum plătˈənəm [key], metallic chemical element; symbol Pt; at. no. 78; at. wt. 195.084; m.p. 1,772℃; b.p. 3,827±100℃; sp. gr. 21.45 at 20℃; valence +2 or +4. Pure platinum is a malleab...

Cook, James

(Encyclopedia)Cook, James, 1728–79, English explorer and navigator. The son of a Yorkshire agricultural laborer, he had little formal education. After an apprenticeship to a firm of shipowners at Whitby, he joine...

herpes simplex

(Encyclopedia)herpes simplex hûrˈpēz [key], an acute viral infection of the skin characterized by one or more painful, itching blisters filled with clear fluid. It is caused by either of two herpes simplex virus...