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turquoise
(Encyclopedia)turquoise, hydrous phosphate of aluminum and copper, Al2(OH)3PO4·H2O+Cu, used as a gem. It occurs rarely in crystal form, but is usually cryptocrystalline. Turquoise is opaque and has a waxy luster; ...Spode, Josiah, I
(Encyclopedia)Spode, Josiah, I, 1733–97, English potter. He founded a pottery firm in 1770 at Stoke-on-Trent in the Staffordshire pottery district. Creating many of his patterns after Japanese designs, he develop...Spectral Classes for Main Sequence Stars (table)
(Encyclopedia)Characteristics of Spectral Classes for Main Sequence Stars ...beryl
(Encyclopedia)beryl bĕrˈĭl [key], mineral, a silicate of beryllium and aluminum, Be3Al2Si6O18, extremely hard, occurring in hexagonal crystals that may be of enormous size and are usually white, yellow, green, b...hyacinth, in botany
(Encyclopedia)hyacinth, any plant of the genus Hyacinthus, bulbous herbs of the family Liliaceae (lily family) native to the Mediterranean region and South Africa. The common, or Dutch, hyacinth of house and garden...cupric sulfate
(Encyclopedia)cupric sulfate ko͞oˈprĭk sŭlˈfāt, kyo͞oˈ– [key] or copper (II) sulfate, chemical compound, CuSO4, taking the form of white rhombohedral crystals or amorphous powder. It decomposes at 650℃ ...woad
(Encyclopedia)woad, name for a perennial plant (Isatis tinctoria) of the family Cruciferae (or Brassicaceae; mustard family) and for a blue dye obtained from its leaves. The plant is believed to be native to S Russ...Bahr el Azraq
(Encyclopedia)Bahr el Azraq, river, Sudan: see Blue Nile. ...Brasstown Bald
(Encyclopedia)Brasstown Bald, peak, 4,784 ft (1,458 m) high, N Ga., in the Blue Ridge of the Appalachian Mts., near the N.C. line. It is the highest point in Georgia. ...sirenian
(Encyclopedia)sirenian sīrēˈnēən [key] or sea cow, name for a large aquatic mammal of the order Sirenia. Living sirenians are the dugong and the manatee, both found in warm, shallow waters in sheltered regions...Browse by Subject
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