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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…beryl
(Encyclopedia) berylberylbĕrˈĭl [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…Spectral Classes for Main Sequence Stars (table)
(Encyclopedia) Characteristics of Spectral Classes for Main Sequence Stars Class Color Surface Temperature Strong Lines O blue-white 35,000℃ ionized helium B blue-white 21,000℃ helium A white…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…sulphur-bottom whale
(Encyclopedia) sulphur-bottom whale: see blue whale.cupric sulfate
(Encyclopedia) cupric sulfatecupric sulfatek&oomacr;ˈprĭk sŭlˈfāt, ky&oomacr;ˈ– [key] or copper (II) sulfate, chemical compound, CuSO4, taking the form of white rhombohedral crystals or…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…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…Bahr el Azraq
(Encyclopedia) Bahr el Azraq, river, Sudan: see Blue Nile.Ocean Drilling Program
(Encyclopedia) Ocean Drilling Program: see under Deep Sea Drilling Project.Trending
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