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nitrogen mustard

(Encyclopedia)nitrogen mustard, any of various poisonous compounds originally developed for military use (see poison gas). Like mustard gas and lewisite, it is a vesicant (blistering agent). In the form of its crys...

snake worship

(Encyclopedia)snake worship. The snake has been variously adored as a regenerative power, as a god of evil, as a god of good, as Christ (by the Gnostics), as a phallic deity, as a solar deity, and as a god of death...

Zeus

(Encyclopedia)Zeus zo͞os [key], in Greek religion and mythology, son and successor of Kronos as supreme god. His mother, Rhea, immediately after his birth concealed him from Kronos, who, because he was fated to be...

Wichita, indigenous people of North America

(Encyclopedia)Wichita wĭchˈĭtô [key], Native North Americans whose language belongs to the Caddoan branch of the Hokan-Siouan linguistic stock (see Native American languages). They formerly occupied central Kan...

HIV

(Encyclopedia)HIV, human immunodeficiency virus, either of two closely related retroviruses that invade T-helper lymphocytes and are responsible for AIDS. There are two types of HIV: HIV-1 and HIV-2. HIV-1 is respo...

macular degeneration

(Encyclopedia)macular degeneration, eye disorder causing loss of central vision. The affected area, the macula, lies at the back of the retina and is the part that produces the sharpest vision. The most serious vis...

Johnson, Denis

(Encyclopedia)Johnson, Denis, 1949–2017, American writer, b. Munich, Germany, where his father was a diplomat; B.A. Univ. of Iowa, 1971, M.F.A. Iowa Writers' Workshop, 1974. Years of drinking and taking drugs end...

hashish

(Encyclopedia)hashish hăshˈēsh, –ĭsh [key], resin extracted from the flower clusters and top leaves of the hemp plant, Cannabis sativa, and C. indica. Hashish, called charas in India, is the most potent grade...

Halsted, William Stewart

(Encyclopedia)Halsted, William Stewart hôlˈstĭd [key], 1852–1922, American surgeon, b. New York City, M.D. College of Physicians and Surgeons, 1877. He practiced in New York and in 1886 became the first profes...

Holiday, Billie

(Encyclopedia)Holiday, Billie, 1915–59, American singer, b. Baltimore. Her original name was Eleanora Fagan. She began singing professionally in 1930, and after performing with numerous bands—especially those o...