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snakeroot

(Encyclopedia)snakeroot, name for several plants, among them black snakeroot (see bugbane), button snakeroot or blazing star, senega snakeroot (see milkwort), and white snakeroot. ...

hafnium

(Encyclopedia)hafnium hăfˈnēəm [key], metallic chemical element; symbol Hf; at. no. 72; at. wt. 178.49; m.p. about 2,227℃; b.p. 4,602℃; sp. gr. 13.31 at 20℃; valence +4. Hafnium is a lustrous, ductile, si...

neptunium

(Encyclopedia)neptunium nĕpto͞oˈnēəm [key], radioactive chemical element; symbol Np; at. no. 93; mass number of most stable isotope 237; m.p. about 640℃; b.p. 3,902℃ (estimated); sp. gr. 20.25 at 20℃; va...

quantum field theory

(Encyclopedia)quantum field theory, study of the quantum mechanical interaction of elementary particles and fields. Quantum field theory applied to the understanding of electromagnetism is called quantum electrodyn...

samarium

(Encyclopedia)samarium səmârˈēəm [key], metallic chemical element; symbol Sm; at. no. 62; at. wt. 150.36; m.p. 1,072℃; b.p. 1,791℃; sp. gr. 7.54 at 20℃; valence +2 or +3. Samarium is a lustrous silver-wh...

Ekelund, Vilhelm

(Encyclopedia)Ekelund, Vilhelm vĭlˈəlm āˈkəlŭndˌ [key], 1880–1949, Swedish essayist and poet. Ekelund's writings were influenced by the works of Nietzsche, Hölderlin, and Swedenborg. After publication of...

Favart, Charles Simon

(Encyclopedia)Favart, Charles Simon shärl sēmôNˈ fävärˈ [key], 1710–92, French dramatist and theatrical manager, for a time director of the Opéra-Comique. He was the originator of the modern light opera a...

Harlow, Jean

(Encyclopedia)Harlow, Jean, 1911–37, American movie star, b. Kansas City, Mo., as Harlean Carpentier. Harlow brought charm and a sexual knowingness to a series of comedies during the 1930s, becoming the model of ...

Flamsteed, John

(Encyclopedia)Flamsteed, John flămˈstēd [key], 1646–1719, English astronomer. He was appointed (1675) astronomer royal by King Charles II and carried on his researches at Greenwich Observatory. Over his protes...

Merman, Ethel

(Encyclopedia)Merman, Ethel, 1908–84, American musical comedy star, b. Astoria, N.Y., originally named Ethel Zimmerman. Merman's theater debut was in George and Ira Gershwin's Girl Crazy (1930). Noted for her bra...