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Macke, August

(Encyclopedia)Macke, August ouˈgo͝ost mäˈkə [key], 1887–1914, German painter. Trained in Germany, he made several trips to Paris, where he came in contact with impressionism and the fauvist and cubist painte...

ophthalmology

(Encyclopedia)ophthalmology ŏfˌthălmŏlˈəjē [key], branch of medicine specializing in the anatomy, function and diseases of the eye. Ophthalmologists specialize in the medical and surgical treatment of eye di...

refraction

(Encyclopedia)refraction, in physics, deflection of a wave on passing obliquely from one transparent medium into a second medium in which its speed is different, as the passage of a light ray from air into glass. O...

cowpox

(Encyclopedia)cowpox, infectious disease of cows caused by a virus related to the virus of smallpox. Also called variola, it is characterized by pustular lesions on the teats and udder. Cowpox is transmitted by con...

Alarcón, Hernando de

(Encyclopedia)Alarcón, Hernando de ārnänˈdō dā älärkōnˈ [key], fl. 1540, Spanish explorer in the Southwest. He was given command of a fleet that was supposed to support the land expedition of Francisco V�...

tularemia

(Encyclopedia)tularemia to͞olərēˈmēə [key] or rabbit fever, acute, infectious disease caused by Francisella tularensis (Pasteurella tularensis). The greatest incidence is among people who handle infected wild...

silver nitrate

(Encyclopedia)silver nitrate nīˈtrāt [key], chemical compound, AgNO3, a colorless crystalline material that is very soluble in water. The most important compound of silver, it is used in the preparation of silve...

eczema

(Encyclopedia)eczema ĕkˈsəmə [key], acute or chronic skin disease characterized by redness, itching, serum-filled blisters, crusting, and scaling. Predisposing factors are familial history of allergic disorders...

infectious canine hepatitis

(Encyclopedia)infectious canine hepatitis, acute viral disease of canines, especially dogs and foxes. The causative agent, an adenovirus, is not infectious to humans. In foxes the disease is manifested primarily as...

pedophilia

(Encyclopedia)pedophilia, psychosexual disorder in which there is a preference for sexual activity with prepubertal children. Pedophiles are almost always males. The children are more often of the opposite sex (abo...