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Possible definitions for nacre

Acre
Seaport city (pop., 1993 est.: 44,000), NW Israel on the Mediterranean coast. First mentioned in an Egyptian text from the 19th cent. BC, it was ruled by Egyptians, Romans, Persians, and Arabs; under Phoenician rule it was called Ptolemais. It was a Syrian town under the Seljuq Turks when the crusaders captured it in 1104; the Crusaders renamed the city St. Jean d'Acre and made it their last capital (see Crusades). Except for brief intervals, it was under the rule of Ottoman Turks from 1516 until British forces took it in 1918. It was part of Palestine under the British mandate and became part of Israel in 1948. Notable structures include the Great Mosque and the Crypt of St. John.


Aachen
City (pop., 1995 est.: 247,000), W Germany, southwest of Cologne. It was inhabited by Romans in the 1st cent. AD. A center of Carolingian culture, and the second city of Charlemagne's empire, it was the site of his great palace. The cathedral built by Charlemagne c.800 saw the coronation of most German kings of the 10th-16th cent.; his chapel, with his tomb, remains as part of the larger Gothic cathedral today. Aachen was part of France 1801-15. It is famous for its many spas.


acne
Any of some 50 inflammatory diseases of the oil glands of the skin. Acne vulgaris, probably the most frequent chronic skin disorder, results from an interplay of hereditary factors, hormones, and bacteria, beginning in the teen years when overactive sebaceous glands are stimulated by high levels of androgens. Its primary lesion, the blackhead, may be open or closed; it consists of a plug of skin oil (sebum), cell debris, and microorganisms in a hair follicle. Acne has four grades of severity, with increasing degrees of spread, inflammation, pustule formation, and scarring. Lower grades generally respond to treatment, which may include skin medication, sunlight, antibiotics, and hormones; many cases eventually resolve spontaneously.


cache
Temporary computer storage used for quick retrieval of data in order to increase processing speed. The cached data can be stored in a reserved area of RAM, a special cache chip (separate from the CPU) that provides faster access than RAM, or on the disk drive. By keeping frequently accessed data in a rapidly accessible place, the computer can respond quickly to requests for those data without having to perform time-consuming searches of RAM or hard drives. Since a "stale" cache will contain data that have been superseded by later information, the cached data must be refreshed periodically.


Caere
Ancient city, Etruria. Located northwest of Rome near the modern city of Ceveteri, it was an important trading center. Brought under the Romans in 253 BC, it prospered under the empire but declined in later centuries. The derived Latin word caeremonium (source of English ceremony) reflects the Etruscan fascination with divination and prophecy. Tomb chambers have ...

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Top words beginning with N: nalita, noncontributing, nonsitting, nonexultation, nonexcessive, nonfouling, nycticebus, nonsubstantial, nigrosins, necroinflammatory, northeastwards, nonaromatic, nagara, neutralised, nonpower, notal, neednt, nonreclamation, numerus, nonfreezable

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