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hotbed

(Encyclopedia)hotbed, low, glass-covered frame structure for starting tender plants. It differs from a cold frame only in that the soil is heated—either artificially as by underground electric wiring or steampipe...

Aristotle

(Encyclopedia)Aristotle ărˌĭstŏtˈəl [key], 384–322 b.c., Greek philosopher, b. Stagira. He is sometimes called the Stagirite. After the decline of Rome, Aristotle's work was lost in the West. However, in ...

Lange, Friedrich Albert

(Encyclopedia)Lange, Friedrich Albert frēˈdrĭkh älˈbĕrt längˈə [key], 1828–75, German neo-Kantian philosopher. He accepted the materialistic method of investigating phenomena but rejected its concept of ...

Krausz, Ferenc

(Encyclopedia)Ferenc Krausz, 1962– , b. Mór, Hungary, Hungarian physicist, studied at Eötvös Loránd University and Technical University of Budapest in Hungary ...

Tatian

(Encyclopedia)Tatian tāˈshən [key], 2d cent., Christian apologist. Probably born in Syria, he was a pupil of Justin Martyr. After his master's death, he left Christianity, becoming an Encratitic Gnostic—i.e., ...

cough

(Encyclopedia)cough, sudden, forceful expiration of air from the lungs caused by an involuntary contraction of the muscles controlling the process of breathing. The cough is a response to some irritating condition ...

Curry, John Steuart

(Encyclopedia)Curry, John Steuart, 1897–1946, American painter, b. Dunavant, Jefferson co., Kans. He spent his youth on his father's farm. In 1916 he entered the Kansas City Art Institute and later studied in Chi...

Dewar, Sir James

(Encyclopedia)Dewar, Sir James dyo͞oˈər [key], 1842–1923, British chemist and physicist, b. Scotland. He was professor of chemistry (from 1877) at the Royal Institution, London, and later was director of the D...

Diogenes of Apollonia

(Encyclopedia)Diogenes of Apollonia ăpəlōˈnēə [key], 5th cent. b.c., Greek philosopher. An eclectic, he reverted to the Milesian tradition of a century earlier in seeking to explain the constitution of all ma...

vacuum cleaner

(Encyclopedia)vacuum cleaner, mechanical device using a draft of air to remove dust, loose dirt, or other particulate matter from dry surfaces. It is especially useful on highly textured surfaces, such as carpets a...