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Aguirre, Lope de

(Encyclopedia)Aguirre, Lope de lōˈpā ᵺā agēˈrā [key], c.1510–1561, Spanish rebel and adventurer in colonial South America. He was often involved in violence and sedition before joining (1560) the expedit...

inorganic chemistry

(Encyclopedia)inorganic chemistry, the study of all the elements and their compounds with the exception of carbon and its compounds, which fall under the category of organic chemistry. Inorganic chemistry investiga...

Cytoxan

(Encyclopedia)Cytoxan sītŏkˈsĭn [key], trade name for the drug cyclophosphamide, used to inhibit growth of tumors and rapidly proliferating cells. It is used in the treatment of leukemia, Hodgkin's disease, and...

cold frame

(Encyclopedia)cold frame, in horticulture, sun-heated board frame covered with a removable top of glass or other transparent material and sunk into the ground. The top may be solid or slatted or screened for shade....

dialysis

(Encyclopedia)dialysis dīălˈĭsĭs [key], in chemistry, transfer of solute (dissolved solids) across a semipermeable membrane. Strictly speaking, dialysis refers only to the transfer of the solute; transfer of t...

coal mining

(Encyclopedia)coal mining, physical extraction of coal resources to yield coal; also, the business of exploring for, developing, mining, and transporting coal in any form. Coal has been historically important indus...

ash, in chemistry

(Encyclopedia)ash, in chemistry, solid residue of combustion. The chemical composition of an ash depends on that of the substance burned. Wood ash contains metal carbonates (e.g., potassium carbonate) and oxides fo...

spermaceti

(Encyclopedia)spermaceti spûrˈməsēˈtē [key], solid waxy substance, white, odorless, and tasteless, separated from the oils obtained from the sperm whale (see sperm oil) and other marine mammals. A mixture of ...

heat

(Encyclopedia)heat, nonmechanical energy in transit, associated with differences in temperature between a system and its surroundings or between parts of the same system. The study of heat and its relationship ...

Kachchh

(Encyclopedia)Kachchh, Kutch, or Cutch all: kŭch [key], district (1991 pop. 1,252,507), 17,000 sq mi (44,030 sq km), Gujarat state, W India, bounded on the N by Pakistan. It is largely barren except for a fertile...