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senility

(Encyclopedia)senility sənilˈətē [key], deterioration of body and mind associated with old age. Indications of old age vary in the time of their appearance. Stooped posture, wrinkled skin, decrease in muscle st...

tetracycline

(Encyclopedia)tetracycline tĕˌtrəsīˈklēn [key], any of a group of antibiotics produced by bacteria of the genus Streptomyces. Effective against a wide range of Gram positive and Gram negative bacteria, tetrac...

McCarthy, Mary Therese

(Encyclopedia)McCarthy, Mary Therese, 1912–89, American writer, b. Seattle, grad. Vassar, 1933. As drama critic for the Partisan Review (1937–45), she gained a reputation for wit, intellect, and acerbity. Her n...

McCullers, Carson

(Encyclopedia)McCullers, Carson, 1917–67, American novelist, b. Columbus, Ga. as Lula Carson Smith, studied at Columbia. The central theme of her novels is the spiritual isolation that underlies the human conditi...

curling

(Encyclopedia)curling, winter sport, similar in principle to bowls and quoits (see horseshoe pitching), played on an ice court called a sheet by teams of four. Each player hurls a squat, circular stone—weighing 3...

neostigmine

(Encyclopedia)neostigmine nēˌōstĭgˈmēn, –mĭn [key], drug used to mimic the effects of stimulation of the parasympathetic nervous system. Along with several other drugs that have a similar mode of action, i...

vegetative propagation

(Encyclopedia)vegetative propagation, the ability of plants to reproduce without sexual reproduction, by producing new plants from existing vegetative structures. Some plants, such as the Canada thistle and most ba...

Young, Thomas

(Encyclopedia)Young, Thomas, 1773–1829, English physicist, physician, and Egyptologist. He established (1799) a medical practice in London and was elected (1811) to the staff of St. George's Hospital there. His l...

pigmentation

(Encyclopedia)pigmentation, name for the coloring matter found in certain plant and animal cells and for the color produced thereby. Pigmentation occurs in nearly all living organisms. Almost all plants synthesize ...

Montand, Yves

(Encyclopedia)Montand, Yves ēv môNtäNˈ [key], 1921–1991, French singer and actor, b. Italy as Ivo Livi. His family settled in Marseille when he was an infant. He quit school at 11, held various manual-labor j...