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glaucoma
(Encyclopedia) glaucomaglaucomaglôkōˈmə [key], ocular disorder characterized by pressure within the eyeball caused by an excessive amount of aqueous humor (the fluid substance filling the eyeball).…hostage
(Encyclopedia) hostage, person held by another as a guarantee that certain actions or promises will or will not be carried out. During periods of internal turmoil, insurgents often seize hostages;…Jehovah's Witnesses
(Encyclopedia) Jehovah's Witnesses, Christian group originating in the United States at the end of the 19th cent., organized by Charles Taze Russell, whose doctrine centers on the Second Coming of…artesian well
(Encyclopedia) artesian well, deep drilled well through which water is forced upward under pressure. The water in an artesian well flows from an aquifer, which is a layer of very porous rock or…melting point
(Encyclopedia) melting point, temperature at which a substance changes its state from solid to liquid. Under standard atmospheric pressure different pure crystalline solids will each melt at a…division, in mathematics
(Encyclopedia) division, fundamental operation in arithmetic; the inverse of multiplication. Division may be indicated by the symbol ÷, as in 15 ÷ 3, or simply by a fraction, 15/3. The number that is…Moore's Law
(Encyclopedia) Moore's Law, a projection of semiconductor manufacturing trends made by Gordon E. Moore, cofounder of the Intel Corp., in a 1965 magazine article. He observed that the number of…bedbug
(Encyclopedia) bedbug, any of the small, blood-sucking bugs of the family Cimicidae, which includes about 30 species distributed throughout the world. Bedbugs are flat-bodied, oval, reddish brown,…placebo
(Encyclopedia) placeboplacebopləsēˈbō [key], inert substance given instead of a potent drug. Placebo medications are sometimes prescribed when a drug is not really needed or when one would not be…seeing
(Encyclopedia) seeing, in astronomy, the clarity with which stars and other celestial objects can be observed. It is primarily determined by the atmosphere of the earth. The most obvious phenomenon…Trending
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