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calcination

(Encyclopedia) calcinationcalcinationkălˌsənāˈshən [key], in metallurgy, process of heating solid material to drive off volatile chemically combined components, e.g., carbon dioxide. It is sometimes…

Hydra, in Greek mythology

(Encyclopedia) Hydra, in Greek mythology, many-headed water serpent; offspring of Typhon and Echidna. When one of its heads was cut off, two new heads appeared. The second labor of Hercules was to…

amortization

(Encyclopedia) amortizationamortizationămˌərtəzāˈshən, əmôrˈ– [key], reduction, liquidation, or satisfaction of a debt. The term amortization may also refer to the sum used for that purpose. The term…

Biddle, Nicholas, American naval officer

(Encyclopedia) Biddle, Nicholas, 1750–78, American naval officer, b. Philadelphia. Biddle left the British navy in 1773. In the American Revolution he became captain in the patriot navy and daringly…

sinking fund

(Encyclopedia) sinking fund, sum set apart periodically from the income of a government or a business and allowed to accumulate in order ultimately to pay off a debt. A preferred investment for a…

detonator

(Encyclopedia) detonatordetonatordĕˈtənāˌtər [key], type of explosive that reacts with great rapidity and is used to set off other, more inert explosives. Fulminate of mercury mixed with potassium…