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emerald flash
(Encyclopedia)emerald flash: see green flash. ...Houdin, Jean Eugène Robert
(Encyclopedia)Houdin, Jean Eugène Robert or Jean Eugène Robert-Houdin zhäN özhĕnˈ rōbĕrˈ o͞odăNˈ [key], 1805–71, French conjurer and magician. Originally a clockmaker, he was celebrated for his optica...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 their organic conte...chloroplast
(Encyclopedia)chloroplast klōrˈəplăstˌ, klôrˈ– [key], a complex, discrete green structure, or organelle, contained in the cytoplasm of plant cells. Chloroplasts are reponsible for the green color of almost...ferrous sulfate
(Encyclopedia)ferrous sulfate or iron (II) sulfate, chemical compound, FeSO4. It is known as the monohydrate, FeSO4·H2O; the tetrahydrate, FeSO4·4H2O; the pentahydrate, FeSO4·5H2O; and the heptahydrate, FeSO4·7...Herrera, Carmen
(Encyclopedia)Herrera, Carmen, 1915–, Cuban-American abstract painter, b. Havana. After studying architecture at the Univ. of Havana (1938–39), she trained at the Art Students League, New York (1942–43), then...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...Robert the Strong
(Encyclopedia)Robert the Strong, d. 866, French warrior, marquess of Neustria; father of the French kings Eudes and Robert I and ancestor of the Capetians. He joined the rebellious nobles against Charles II, Empero...Yorke, Henry Vincent
(Encyclopedia)Yorke, Henry Vincent: see Green, Henry. ...Robert Grosseteste
(Encyclopedia)Robert Grosseteste: see Grosseteste, Robert. ...Browse by Subject
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