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Lederberg, Joshua

(Encyclopedia)Lederberg, Joshua lāˈdərbûrgˌ [key], 1925–2008, American geneticist, b. Montclair, N.J., grad. Columbia, 1944, Ph.D. Yale, 1948. He is known for his studies of the genetic mechanisms of bacteri...

yaws

(Encyclopedia)yaws or frambesia, tropical infection of the skin caused by a spirochete (Treponema pertenue) closely related to that causing syphilis. Yaws, however, is not a sexually transmitted disease, i.e., it i...

long march

(Encyclopedia)long march, Chin., Changzheng, the journey of c.6,000 mi (9,660 km) undertaken by the Red Army of China in 1934–35. When their Jiangxi prov. Soviet base was encircled by the Nationalist army of Chia...

venereal disease

(Encyclopedia)venereal disease vənērˈēəl [key]: see sexually transmitted disease. ...

Delvaux, Paul

(Encyclopedia)Delvaux, Paul, 1897–1994, Belgian painter. Delvaux, influenced by Magritte and Chirico, created meticulous surreal compositions based on Renaissance ideas of perspective and peopled with self-absorb...

Cosby, Bill

(Encyclopedia)Cosby, Bill (William Henry Cosby, Jr.) kŏzˈbē [key], 1937–, American actor and comedian, b. Philadelphia. He became known as a comedian and was subsequently the first African-American actor to st...

selection

(Encyclopedia)selection. In Darwinism, the mechanism of natural selection is considered of major importance in the process of evolution. Popular formulations sometimes envisage a struggle for existence in which dir...

impotence

(Encyclopedia)impotence imˈpətəns [key], inhibited sexual excitement in a man during sexual activity that, despite an unaffected desire for sex, results in inability to attain or maintain a penile erection. Know...

feminism

(Encyclopedia)feminism, movement for the political, social, and educational equality of women with men; the movement has occurred mainly in Europe and the United States. It has its roots in the humanism of the 18th...

sex

(Encyclopedia)sex, term used to refer both to the two groups distinguished as males and females, and to the anatomical and physiological characteristics associated with maleness and femaleness. Sex relates to the t...

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