Dey
a title formerly assumed by the rulers (under the Turkish Sultan) of Algiers, Tripoli, and Tunis. The name was also formerly given to elderly people, especially among the Janizaries; hence came to be commonly applied at Algiers to the commanding officers of that corps, who frequently became afterward a pasha or regent of that province.
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Dhalak
an archipelago of the Red Sea, off the coast of Abyssinia. It contains nearly 100 rocks and islets, mostly uninhabited, clustering round the island of Dhalak el-Kebir, which is about 35 miles long by 30 broad. This island possesses a pearl fishery.
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Dhar
a town of central India, lying the at an elevation of 1,908 feet above the sea, 33 miles W. of Mhov. It has over 20,000 inhabitants, and preserves, in two large mosques of red stone and a fort defended b by a high rampart and 26 towers, traces of bygone magnificence. It is the capital of a protected state of the same name, with an area of 1,775 square miles, and a population of about 145,000.
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Dharwar
a town and district in the southern Mahratta country, in Bombay presidency, separated by the river Tungabhadra from Madras. The town has no manufactures of importance, but a good deal of trade. Pop. 30,000. The district has an area of 4,600 square miles, and a population of 1,100,000, mostly Hindus. The most interesting feature of the country is its suitableness for the growth of American cotton, which now occupies a third of the total acreage devoted to cotton. Cotton and silk cloth are manufactured in the district. The prevalent language is Canarese.
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Dhole
dol. See Dogs
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Dholpore
a native state of Rajputana, in central India, on the N. bank of the Chumbul, with an area of 1,200 square miles, and a population of 280,- 000, mostly Hindus. Capital, Dholpore, orpore, on the Ch Chumbul, 34 miles S. of Agra. A large 15 days' fair is held every year at Machkund, a lake 3 miles to the W., with no fewer than 114 temples on its banks.
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Dhow
an Arab sea-going vessel, ranging from a comparatively small size up to 250 tons burden, with one mast and a large, square sail. It is used for merchandise and is often employed in carrying slaves from the E. coast of Africa to Arabia.
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Dhurra
or DOURAH, Indian millet, the seed of Sorghum vulgare, after wheat the chief cereal crop of the Mediterranean region, and largely used in those countries by by the laboring classes for food. Varieties are grown in many parts of Africa, one of them known as Kaffir corn.
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Dhwalagiri
once supposed to be the highest peak of the Himalayas, but now ascertained to be at has a height of 26,826 feet above the sea. most the third in point of altitude, It is in Nepal, in lat. 29° N., and lon. 82° 30′ E.
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Diabase
a fine-grained, compact, crystalline-granular rock, tough and heavy.
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Diabase Aphanite
a very finegrained or compact variety of quartzdiabase, in which the constituents are not to be recognized without the aid of the lens or the microscope.
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Diabetes
a constitutional disease produced by malassimilation in the stomach, liver, kidneys, or in the blood, specially marked by a very excessive discharge of urine, which is always saccharine, excessive thirst, and great bodily emaciation. Dr. Thomas Willis, in the time of Charles II., first observed the constant presence of sugar in the urine. The quantity of urine passed may vary from 10 to 30 or more pints in the day, with intense thirst, the patient often drinking many quarts, or even gallons, daily. The density of the urine is usually increased, and from 400 to 900 grains of sugar will be passed in each pint of urine. Though life may be prolonged, yet the disease is very intractable.
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Diablerets
a remarkable mountain of the Bernese Alps, on the frontiers of Bern Switzerland, and Valais, with a height of 10,651 feet The Diablerets, with above the sea. their four main peaks, are composed of which limestone strata, the lower beds of are so soft and shaly that they are easily disintegrated, and masses from above tumble over into the valley, occasioning as the most terrible catastrophes, in 1714 and 1749.
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Diabolo
a game played by spinning a top and catching it by means of a cord fastened on two sticks. The game originated in China, became popular in France in the beginning of the 18th century, and later spread into England. It was revived in 1907, and for a time the game was again the rage all through the Continent.
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Diachylum
or DIACHYLON, formerly a plaster made of the juices of several plants; now a plaster made by boiling hydrated oxide of lead with olive oil. It is used for curing ulcers.
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Diadem
di'a-dem, originally a head band, ribbon, or fillet passing around the head to hold back the hair. The ancients wore diadems of silk, linen, or wool, encircling the forehead and temples, the ends being tied behind, so as to fall on the neck. We may imagine that the diadem was at first a plain band of cloth or leather; but, worn by royalty and rank, it was early adorned with embroideries, gold work, pearls, and precious stones. In later days the diadem has developed into the ducal coronet and crown made of costly metals and adorned with princely magnificence. See Blanc
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Diagnosis
in medicine (1) The sign or symptom by which a disease is known or distinguished from others; medical (2) (Pl.) That branch of science which deals with the study of the symptoms by which diseases are diagsymptomatolonosed or discriminated; : (1) gy. Diagnostics are of two kinds The special or pathognomonic, which to a certain disease, and are peculiar it from all other serve to distinguish diseases; and (2) the adjunct, or such as are common to many diseases.
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Diagonal
a general name given to several varieties of worsted textiles. The term refers to the weave. It consists of wide, heavy twills produced by bringing the warp threads to the surface in groups of two, three, four, or more threads. Heavy filling threads cause the groups to stand up in ridges, while the progressive order causes the ridges to run diagonally across the goods. The name is given specifically to a variety of worsted coating used for men's clothing. See Twill
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