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transistor
transistor three-terminal, solid-state electronic device used for amplification and switching. It is the solid-state analog to the triode electron tube ; the transistor has replaced the electron tube for virtually all common applications.
Types of Transistors
The transistor is an arrange...
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type
type for printing , was invented in China (c.1040), using woodblocks. Related devices, such as seals and stamps for making impressions in clay, had been used in ancient times in Babylon and elsewhere. Movable type made from metal molds was developed in Korea as early as the beginning of the 13th c...
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elf
elf in Germanic mythology, a type of fairy. Usually represented as tiny people, elves are said to dwell in forests, in the sea, and in the air. Although they can be friendly to man, they are more frequently vengeful and mischievous.
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fishing
fishing act of catching fish for consumption or display. Fishing—usually by hand, club, spear, net, and possibly by hook—was known to prehistoric people. It was practiced by the ancient Persians, Egyptians, and Chinese, and it is mentioned in the Odyssey and in the Bible. It is a majo...
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Gaucher's disease
Gaucher's disease , rare genetic disease involving a deficiency of an enzyme, glucocerebrosidase, which normally breaks down certain body glycolipids (i.e., lipids (fats) that have a sugar molecule attached). There are three types of the disease. In all three types, the enzyme deficiency results ...
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neutrino
neutrino [Ital.,=little neutral (particle)], elementary particle with no electric charge and a very small mass emitted during the decay of certain other particles. The neutrino was first postulated in 1930 by Wolfgang Pauli in order to maintain the law of conservation of energy during beta deca...
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Kelmscott Press
Kelmscott Press printing establishment in London. There William Morris led the 19th-century revival of the art and craft of making books (see arts and crafts ). The first book made by the press was The Story of the Glittering Plain (1891), by William Morris. The masterpiece of the press was T...
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ataxia
ataxia , lack of coordination of the voluntary muscles resulting in irregular movements of the body. Ataxia can be brought on by an injury, infection, or degenerative disease of the central nervous system, e.g., syphilis, encephalitis, brain tumor, or multiple sclerosis. The term also designates a s...
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species
species in biology, a category of classification , the original and still the basic unit in the demarcation of plant and animal types. The species marks the boundary between populations of organisms rather than between individuals. Because related species are not absolutely permanent (see evoluti...
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diabetes
diabetes or diabetes mellitus , chronic disorder of glucose (sugar) metabolism caused by inadequate production or use of insulin , a hormone produced in specialized cells (beta cells in the islets of Langerhans) in the pancreas that allows the body to use and store glucose. It is a leadin...
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