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fuller's earth

(Encyclopedia)fuller's earth, mineral substance characterized by the property of absorbing basic colors and removing them from oils. It is composed mainly of alumina, silica, iron oxides, lime, magnesia, and water,...

alloy

(Encyclopedia)alloy ălˈoi, əloiˈ [key] [O. Fr.,=combine], substance with metallic properties that consists of a metal fused with one or more metals or nonmetals. Alloys may be a homogeneous solid solution, a he...

podzol

(Encyclopedia)podzol pŏdˈsŏl [key] or podzolic soil, member of a group of soils that are gray in color, have an ashy appearance, and extend immediately south of the tundra regions of the Northern Hemisphere. Alt...

Bras d'Or Lake

(Encyclopedia)Bras d'Or Lake brä dôr [key], arm of the Atlantic Ocean, c.360 sq mi (930 sq km), indenting deeply into Cape Breton Island, N.S., SE Canada, and occupying much of the interior. A narrow channel link...

rosin

(Encyclopedia)rosin or colophony, hard, brittle, translucent resin, obtained as a solid residue from crude turpentine. Usually pale yellow or amber, its color may vary from brownish-black to transparent depending o...

Liebig, Justus, Baron von

(Encyclopedia)Liebig, Justus, Baron von yo͝osˈto͝os bärônˈ fən lēˈbĭkh [key], 1803–73, German chemist. As professor at Giessen (1824–52), he was among the first to establish a chemical teaching labora...

lapis lazuli

(Encyclopedia)lapis lazuli lăpˈĭs lăzˈo͝olē [key], gem, deep blue, violet, or greenish blue in color and usually flecked with yellow iron pyrites. It is composed of lazurite, a complex sodium aluminum silica...

agar, substance obtained from seaweed

(Encyclopedia)agar äˈgär, āˈ–, ăgˈär [key], product obtained from several species of red algae, or seaweed, chiefly from the Ceylon, or Jaffna, moss (Gracilaria lichenoides) and species of Gelidium, harve...

spotted lanternfly

(Encyclopedia)spotted lanternfly, common name for a planthopper, Lycorma delicatula, an insect that is native to China, India, and Vietnam, and is an introduced agricultural pest in Korea and the United States. The...

bauxite

(Encyclopedia)bauxite bôkˈsīt, bŏkˈ– [key], mixture of hydrated aluminum oxides usually containing oxides of iron and silicon in varying quantities. A noncrystalline substance formerly thought to be a minera...