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Rhineland-Palatinate

(Encyclopedia)Rhineland-Palatinate rīnˈlănd pəlătˈĭnĭtˌ [key], Ger. Rheinland-Pfalz, state (1994 pop. 3,926,000), 7,658 sq mi (19,834 sq km), W Germany. Mainz is the capital. The state was formed in 1946 b...

horticulture

(Encyclopedia)horticulture [Lat. hortus=garden], science and art of gardening and of cultivating fruits, vegetables, flowers, and ornamental plants. Horticulture generally refers to small-scale gardening, and agric...

Bayer process

(Encyclopedia)Bayer process, procedure for obtaining alumina from the aluminum ore bauxite. The alumina can then be used for various industrial purposes or smelted to provide aluminum. The first step in the process...

heat exhaustion

(Encyclopedia)heat exhaustion, condition caused by overexposure to sunlight or another heat source and resulting in dehydration and salt depletion, also known as heat prostration. The symptoms are severe headaches,...

diffusion

(Encyclopedia)diffusion, in chemistry, the spontaneous migration of substances from regions where their concentration is high to regions where their concentration is low. Diffusion is important in many life process...

Riley, Charles Valentine

(Encyclopedia)Riley, Charles Valentine, 1843–95, American entomologist, b. England. He emigrated to the United States in 1860 and served as state entomologist (1868–77) of Missouri and as entomologist (1878–7...

Armour, Philip Danforth

(Encyclopedia)Armour, Philip Danforth ärˈmər [key], 1832–1901, American meatpacker, b. Stockbridge, N.Y. Armour's Chicago meatpacking plants introduced new principles of large-scale organization, as well as re...

F

(Encyclopedia)F, sixth letter of the alphabet. The Greek letter corresponding to it, digamma, which probably represented a sound like w, disappeared before the classical period. In Western alphabets f has usually r...

acetate

(Encyclopedia)acetate ăsˈĭtātˌ [key], one of the most important forms of artificial cellulose-based fibers; the ester of acetic acid. The first patents for the production of fibers from cellulose acetate appea...

A

(Encyclopedia)A, first letter of the alphabet. A is a usual symbol for a low central vowel, as in father; the English long a (ā) is pronounced as a diphthong of ĕ and y. The corresponding letter of the Greek alph...
 

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