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alizarin
(Encyclopedia)alizarin əlĭzˈərĭn [key], or 1,2-dihydroxyanthraquinone, mordant vegetable dye obtained originally from the root of the madder plant (Rubia tinctorum), in which it occurs as a glucoside. The term...grayling
(Encyclopedia)grayling, common name for a brilliantly colored fish belonging to the genus Thymallus, of the family Salmonidae (salmon family), and closely allied to the smelt. Graylings are found chiefly in clear, ...flame test
(Encyclopedia)flame test, test used in the identification of certain metals. It is based on the observation that light emitted by any element gives a unique spectrum when passed through a spectroscope. When a salt ...Price, Leontyne
(Encyclopedia)Price, Leontyne lāˈəntēn [key], 1927–, American soprano, b. Laurel, Miss., as Mary Violet Leontine Price. She studied voice at Juilliard with Florence Page Kimball. Subsequently she appeared as ...blue jay
(Encyclopedia)blue jay, common name for a familiar bird (Cyanocitta cristata) of central and E North America, allied to the crow, the raven, and the magpie, belonging to the family Corvidae. Almost a foot (30 cm) l...Saint David's
(Encyclopedia)Saint David's, Welsh Tyddewi, small town, Pembrokeshire, SW Wales. The renowned town cathedral is mainly Transitional Norman in style, built of red-violet stone. Among its features is the late 13th-ce...prism
(Encyclopedia)prism, in optics, a piece of translucent glass or crystal used to form a spectrum of light separated according to colors. Its cross section is usually triangular. The light becomes separated because d...hyssop
(Encyclopedia)hyssop hĭsˈəp [key], aromatic, perennial, somewhat woody herb (Hyssopus officinalis) of the family Labiatae (mint family), native to the Old World but partially naturalized in North America. The pl...tourmaline
(Encyclopedia)tourmaline to͝orˈməlĭn, –lēn [key], complex borosilicate mineral with varying amounts of aluminum, iron, magnesium, sodium, lithium, potassium, and sometimes other elements, used as a gem. It o...corundum
(Encyclopedia)corundum kərŭnˈdəm [key], mineral, aluminum oxide, Al2O3. The clear varieties are used as gems and the opaque as abrasive materials. Corundum occurs in crystals of the hexagonal system and in mass...Browse by Subject
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