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einsteinium

(Encyclopedia)einsteinium īnˈstīˌnēəm, īnstīˈ– [key] [for Albert Einstein], artificially produced radioactive chemical element; symbol Es; at. no. 99; mass no. of most stable isotope 252; m.p. about 860�...

empiricism

(Encyclopedia)empiricism ĕmpĭrˈĭsĭzəm [key] [Gr.,=experience], philosophical doctrine that all knowledge is derived from experience. For most empiricists, experience includes inner experience—reflection upo...

neptunium

(Encyclopedia)neptunium nĕpto͞oˈnēəm [key], radioactive chemical element; symbol Np; at. no. 93; mass number of most stable isotope 237; m.p. about 640℃; b.p. 3,902℃ (estimated); sp. gr. 20.25 at 20℃; va...

association

(Encyclopedia)association, in psychology, a connection between different sensations, feelings, or ideas by virtue of their previous occurrence together in experience. The concept of association entered contemporary...

mendelevium

(Encyclopedia)mendelevium mĕndəlāvˈēəm [key], artificially produced radioactive chemical element; symbol Md; at. no. 101; mass no. of most stable isotope 258; m.p. 827℃; b.p. and sp. gr. unknown; valence +1...

Reed, Ishmael Scott

(Encyclopedia) Reed, Ishmael Scott, 1938- , African-American novelist, poet, and social critic, b. Chattanooga, Tn. When he was a child, Reed’s family moved ...

Reich, Robert Bernard

(Encyclopedia)Reich, Robert Bernard rīsh, rīk [key], 1946–, American political economist and government official, b. Scranton, Pa. He attended Dartmouth, Oxford (where he and Bill Clinton were Rhodes scholars),...

Brenner, Sydney

(Encyclopedia)Brenner, Sydney, 1927–2019, British molecular biologist, Ph.D. Oxford, 1954. He was director of the MRC Laboratory of Molecular Biology in Cambridge, England (1979–86), and director of the MRC Mol...

Wiseman, Frederick

(Encyclopedia)Wiseman, Frederick, 1930–, American documentary filmmaker, b. Boston, grad. Williams College (B.A., 1951), Yale Law School (LL.B., 1954). Wiseman practiced and taught law for about a decade, but his...

Yellen, Janet Louise

(Encyclopedia)Yellen, Janet Louise yĕlˈən [key], 1946–, U.S. economist and government official, b. Brooklyn, N.Y., B.A. Brown (1967), Ph.D. Yale (1971). Yellen taught economics (1971–76) at Harvard and subse...