U.S. History. the unofficial designation for the U.S. War Department’s secret program, organized in 1942, to explore the isolation of radioactive isotopes and the production of an atomic bomb: initial research was conducted at Columbia University in Manhattan.
(during World War II) the code name for the secret US project set up in 1942 to develop an atomic bomb
The code name for the effort to develop atomic bombs for the United States during World War II. The first controlled nuclear reaction took place in Chicago in 1942, and by 1945, bombs had been manufactured that used this chain reaction to produce great explosive force. The project was carried out in enormous secrecy. After a test explosion in July 1945, the United States dropped atomic bombs on the Japanese cities of Hiroshima and Nagasaki.
- Manhattan side
noun phrase The right side of the bowling alley as one faces the pins [1940s+ Bowling; fr the location of Manhattan as one looks south along the East River]
[man-hel-per] /ˈmænˌhɛl pər/ noun 1. a long pole for holding a paintbrush, used in painting areas otherwise out of ordinary reach.
/ˈmænhɪə/ noun 1. Bill. born 1946, New Zealand poet and writer. His poetry collections include How to Take Off Your Clothes at the Picnic (1977), Zoetropes (1984), Sunshine (1996), and Lifted (2005)
[man-hohl] /ˈmænˌhoʊl/ noun 1. a , usually with a cover, through which a person may enter a sewer, drain, steam boiler, etc., especially one located in a city street. /ˈmænˌhəʊl/ noun 1. Also called inspection chamber. a shaft with a removable cover that leads down to a sewer or drain 2. a hole, usually with […]