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diffusion

(Encyclopedia)diffusion, in chemistry, the spontaneous migration of substances from regions where their concentration is high to regions where their concentration is low. Diffusion is important in many life process...

DNA fingerprinting

(Encyclopedia)DNA fingerprinting or DNA profiling, any of several similar techniques for analyzing and comparing DNA from separate sources, used especially in law enforcement to identify suspects from hair, blood, ...

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...

Némirovsky, Irène

(Encyclopedia)Némirovsky, Irène, 1903–42, French novelist, b. Kiev. The daughter of a Jewish banker who fled (1918) the Russian Revolution with his family and settled (1919) in Paris, she studied at the Sorbonn...

Lassa fever

(Encyclopedia)Lassa fever lăsˈə [key], an acute viral disease occurring mostly in W Africa, characterized by high fever, muscle aches, mouth ulcers, and bleeding in the skin in more severe cases. The disease was...

salicylate

(Encyclopedia)salicylate səlĭsˈəlātˌ [key], any of a group of analgesics, or painkilling drugs, that are derivatives of salicylic acid. The best known is acetylsalicylic acid, or aspirin. Now often made synth...

Kurosawa, Akira

(Encyclopedia)Kurosawa, Akira äkēˈrä ko͞orōˈsäwä [key], 1910–98, Japanese film director, scriptwriter, and producer, b. Tokyo. He is regarded as one of the world's greatest directors. In Rashomon (1950),...

totem

(Encyclopedia)totem tōˈtəm [key], an object, usually an animal or plant (or all animals or plants of that species), that is revered by members of a particular social group because of a mystical or ritual relatio...

Albright, Madeleine

(Encyclopedia)Albright, Madeleine, 1937–2022, American government official, b. Prague, Czechoslovakia, as Maria Jana Körbel. Her family immigrated to the United States in 1948, and she attended Welle...

anabolic steroid

(Encyclopedia)anabolic steroid ănˌdrōjĕnˈĭk [key], any of a group of synthetic derivatives of testosterone that promote muscle and bone growth. Used to treat uncontrolled weight loss in wasting diseases, anab...