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conjunction, in astronomy
(Encyclopedia) conjunction, in astronomy, alignment of two celestial bodies as seen from the earth. Conjunction of the moon and the planets is often determined by reference to the sun. When a body is…cover crop
(Encyclopedia) cover crop, green temporary crop grown to prevent or reduce erosion and to improve the soil by building up its organic content. Green-manure crops, which are specifically grown for…Geoffroy, Étienne François
(Encyclopedia) Geoffroy, Étienne FrançoisGeoffroy, Étienne Françoisātyĕnˈ fräNswäˈ zhôfrwäˈ [key], 1672–1731, French physician and chemist, also known as Geoffroy the Elder. He became a pharmacist in…Honorius I
(Encyclopedia) Honorius IHonorius Ihōnôrˈēəs [key], pope (625–38), an Italian; successor of Boniface V. He showed great interest in the church in Spain and the British Isles, and he did a great deal…identity theft
(Encyclopedia) identity theft, the use of one person's personal information by another to commit fraud or other crimes. The most common forms of identity theft occur when someone obtains another…infectious canine hepatitis
(Encyclopedia) infectious canine hepatitis, acute viral disease of canines, especially dogs and foxes. The causative agent, an adenovirus, is not infectious to humans. In foxes the disease is…Medea
(Encyclopedia) MedeaMedeamĭdēˈə [key], in Greek mythology, princess of Colchis, skilled in magic and sorcery. She fell in love with Jason and helped him, against the will of her father, Aeëtes, to…asphalt
(Encyclopedia) asphaltasphaltăsˈfôlt, –fălt [key], brownish-black substance used commonly in road making, roofing, and waterproofing. Chemically, it is a natural mixture of hydrocarbons. It varies in…circumpolar star
(Encyclopedia) circumpolar star, star whose diurnal circle lies completely above or completely below an observer's horizon. A star whose diurnal circle lies above the horizon never sets, even though…disk plow
(Encyclopedia) disk plow or disk, farm implement employing a row or rows of concave circular steel disks that cut and pitch the soil in a way somewhat similar to a moldboard plow. It can be used in…Trending
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