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alkaloid
(Encyclopedia) alkaloid, any of a class of organic compounds composed of carbon, hydrogen, nitrogen, and usually oxygen that are often derived from plants. Although the name means alkalilike, some…folk medicine
(Encyclopedia) folk medicine, methods of curing by means of healing objects, herbs, or animal parts; ceremony; conjuring, magic, or witchcraft; and other means apart from the formalized practice of…fiddler crab
(Encyclopedia) fiddler crab, common name for small, amphibious crabs belonging to the genus Uca. They are characterized by a rectangular carapace (shell) and a narrow abdomen, which is flexed under…bubble chamber
(Encyclopedia) bubble chamber, device for detecting charged particles and other radiation by means of tracks of bubbles left in a chamber filled with liquid hydrogen or other liquefied gas. It was…magnesium
(Encyclopedia) magnesiummagnesiummăgnēˈzēəm, –zhəm [key], metallic chemical element; symbol Mg; at. no. 12; at. wt. 24.3050; m.p. about 648.8℃; b.p. about 1,090℃; sp. gr. 1.738 at 20℃; valence +2. In…chemical bond
(Encyclopedia) chemical bond, mechanism whereby atoms combine to form molecules. There is a chemical bond between two atoms or groups of atoms when the forces acting between them are strong enough to…sulfur
(Encyclopedia) CE5 Sulfur crystals sulfur or sulphursulfursŭlˈfər [key], nonmetallic chemical element; symbol S; at. no. 16; interval in which at. wt. ranges 32.059–32.076; m.p. 112.8℃ (rhombic…atonement
(Encyclopedia) atonement, the reconciliation, or “at-one-ment,” of sinful humanity with God. In Judaism both the Bible and rabbinical thought reflect the belief that God's chosen people must be pure…memory, in psychology
(Encyclopedia) memory, in psychology, the storing of learned information, and the ability to recall that which has been stored. It has been hypothesized that three processes occur in remembering:…dust, atmospheric
(Encyclopedia) dust, atmospheric, minute particles slowly settling or suspended by slight currents and existing in varying amounts in all air. There is least dust at high levels over the ocean and…Trending
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