Columbia Encyclopedia

(Encyclopedia) Hahn, Otto ôˈtō hän [key], 1879–1968, German chemist and physicist. His important contributions in the field of radioactivity include the discovery of several radioactive substances, the develop...

(Encyclopedia) Hahn, Reynaldo, 1875–1947, French musician. Hahn was born in Venezuela and was taken to Paris at three. Among his teachers was Massenet. He wrote much incidental music, songs, operettas, and other w...

(Encyclopedia) Hahn, James Kenneth, 1951–, American politician. Born into a Los Angeles political family, he is a Democratic lawyer who first served in city government (1981–85) as controller. As city attorney (...

(Encyclopedia) Lilienthal, Otto ôˈtō lēˈlyəntäl [key], 1848–96, German aeronautical engineer, a pioneer in his experiments with gliders. He made major developments in the glider based on his observations of...

(Encyclopedia) Otto the Great: see Otto I, Holy Roman emperor. ...

(Encyclopedia) Otto, Frei Paul ôˈtō [key], 1925–2015, German architect. Most notable for his tensile and pneumatic structures, Otto was among the first major architects to experiment with lightweight design. H...

(Encyclopedia) Nicolai, Otto ôˈtō nēkōläˈē, nēˈkōlī [key], 1810–49, German composer. His opera Il Templario (1840), after Scott's Ivanhoe, was successful, but his masterpiece was the comic opera The Me...

(Encyclopedia) Otto, Nikolaus August nēˈkōlous ouˈgo͝ost ôˈtō [key], 1832–91, German engineer. He was coinventor (1867) of an internal-combustion engine, and he devised (1876) the four-stroke Otto cycle, w...

(Encyclopedia) Bütschli, Otto ôˈtō büchˈlē [key], 1848–1920, German zoologist. He was professor of zoology at the Univ. of Heidelberg. His researches on invertebrate animals advanced knowledge of the develo...

(Encyclopedia) Sverdrup, Otto svĕrˈdro͝op [key], 1855–1930, Norwegian arctic explorer. A companion of Fridtjof Nansen on the voyage across Greenland in 1888 and on Nansen's later (1893–96) polar expedition, ...