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lithography

(Encyclopedia)lithography lĭthŏgˈrəfē [key], type of planographic or surface printing. It is distinguished from letterpress (relief) printing and from intaglio printing (in which the design is cut or etched in...

food preservation

(Encyclopedia)food preservation, methods of preparing food so that it can be stored for future use. Because most foods remain edible for only a brief period of time, people since the earliest ages have experimented...

insulin

(Encyclopedia)insulin, hormone secreted by the β cells of the islets of Langerhans, specific groups of cells in the pancreas. Insufficiency of insulin in the body results in diabetes. Insulin was one of the first ...

Eliot, T. S.

(Encyclopedia)Eliot, T. S. (Thomas Stearns Eliot), 1888–1965, American-British poet and critic, b. St. Louis, Mo. One of the most distinguished literary figures of the 20th cent., T. S. Eliot won the 1948 Nobel P...

Annan, Kofi Atta

(Encyclopedia)Annan, Kofi Atta kōˈfē äˈtä ănˈən [key] 1938–2018, Ghanaian diplomat, the seventh secretary-general of the United Nations (1997–2006) and the first person to hold that office who came fro...

sodium chloride

(Encyclopedia)sodium chloride, NaCl, common salt. Salt is important in many ways. It is an essential part of the diet of both humans and animals and is a part of most animal fluids, such as blood, sweat, and te...

photographic processing

(Encyclopedia)photographic processing, set of procedures by which the latent, or invisible, image produced when a photographic film is exposed to light is made into a permanent visible image. The negative may b...

land use

(Encyclopedia)land use, exploitation of land for agricultural, industrial, residential, recreational, or other purposes. Because the United States historically has a laissez-faire attitude toward land use, the land...

Marie Antoinette

(Encyclopedia)Marie Antoinette ăntwənĕtˈ, äNtwänĕtˈ [key], 1755–93, queen of France, wife of King Louis XVI and daughter of Austrian Archduchess Maria Theresa and Holy Roman Emperor Francis I. She was mar...

Tyler, John

(Encyclopedia)Tyler, John, 1790–1862, 10th President of the United States, b. Charles City co., Va. Tyler, nominated by a small Democratic faction, had withdrawn from the 1844 election. In Feb., 1861, he pres...