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stellar evolution
(Encyclopedia) CE5 The above Hertzsprung-Russell (H-R) diagram shows the track of stellar evolution for a typical star. After spending much of its life evolving toward or along the main sequence, the star becomes...Greek fire
(Encyclopedia)Greek fire, a flammable composition believed to have consisted of sulfur, naphtha, and quicklime. Although known in antiquity, it was first employed on a large scale by the Byzantines. Bronze tubes th...machine translation
(Encyclopedia)machine translation, in computational linguistics, publishing, and other fields, the use of computers to conduct large-scale translation operations. The electronic translation of one language into ano...bugle
(Encyclopedia)bugle, brass wind musical instrument consisting of a conical tube coiled once upon itself, capable of producing five or six harmonics. It is usually in G or B flat. Its principal use is for military a...water
(Encyclopedia) CE5 A. Water molecule (black circles represent valence-shell electrons) B. Structure of ice: Each oxygen atom (white circles) is bonded to four other oxygen atoms by hydrogen bonds, the hydrogen at...Solvay process
(Encyclopedia)Solvay process [for Ernest Solvay], commercial process for the manufacture of sodium carbonate (washing soda). Ammonia and carbon dioxide are passed into a saturated sodium chloride solution to form s...oxygen tent
(Encyclopedia)oxygen tent, device used to maintain a patient in an oxygen-rich environment. The oxygen tent is composed of a clear plastic sheet suspended over the bed and tucked beneath the mattress to provide an ...deliquescence
(Encyclopedia)deliquescence dĕlˌəkwĕsˈəns [key], conversion of a solid substance into a liquid as a result of absorption of water vapor from the air. Since impurities in a solid lower its melting point, the a...Al Aziziyah
(Encyclopedia)Al Aziziyah ăzĭzēˈä [key], town, NW Libya, near Tripoli. It is a major trade center of the Jifarah plain. Al Aziziyah was long considered to have recorded the highest shade temperature on earth, ...rhodium
(Encyclopedia)rhodium rōˈdēəm [key], metallic chemical element; symbol Rh; at. no. 45; at. wt. 102.90550; m.p. about 1,966℃; b.p. 3,727±100℃; sp. gr. 12.41 at 20℃; valence +2, +3, +4, +5, or +6. Rhodium ...Browse by Subject
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