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Ramazzini, Bernardino

(Encyclopedia)Ramazzini, Bernardino bārnärdēˈnō rämät-tsēˈnē [key], 1633–1717, Italian physician. He was professor at Modena (1682–1700) and at Padua until 1714. He is often called the father of indus...

sense

(Encyclopedia)sense, faculty by which external or internal stimuli are conveyed to the brain centers, where they are registered as sensations. Sensory reception occurs in higher animals through a process known as t...

rainbow

(Encyclopedia)rainbow, arc showing the colors of the spectrum, violet inside and red outside, which appears when the sun shines through water droplets. It often appears while the sun is shining after a brief thunde...

Eisenstaedt, Alfred

(Encyclopedia)Eisenstaedt, Alfred, 1898–1995, American photographer, b. Dirschau, Germany (now Tczew, Poland). Widely considered the father of photojournalism, he began creating photo essays in Berlin during the ...

curare

(Encyclopedia)curare kyo͝orärˈē [key], any of a variety of substances originally used as arrow poisons by Native South Americans in hunting and in warfare. The main active substance of curare, tubocurarine, is ...

Harte, Bret

(Encyclopedia)Harte, Bret (Francis Brett Harte) härt [key], 1836–1902, American writer of short stories and humorous verse, b. Albany, N.Y. At 19 he went to California, where he tried his hand at teaching, clerk...

op art

(Encyclopedia)op art ŏp [key], movement that became prominent in the United States and Europe in the mid-1960s. Deriving from abstract expressionism, op art includes paintings concerned with surface kinetics. Colo...

Dublin, county, Republic of Ireland

(Encyclopedia)Dublin, county, 327 sq mi (847 sq km), E central Republic of Ireland, on the Irish Sea. The region is dominated by Dublin, which is ...

Helmholtz, Hermann Ludwig Ferdinand von

(Encyclopedia)Helmholtz, Hermann Ludwig Ferdinand von hĕrˈmän lo͞otˈvĭkh fĕrˈdēnänt fən hĕlmˈhôlts [key], 1821–94, German scientist. Although known especially as a physicist and biologist, he was al...

Hercules cluster

(Encyclopedia)Hercules cluster, giant globular star cluster in the northern constellation Hercules; cataloged as M13 or NGC 6205. The cluster is just visible to the naked eye and is the best example of a globular c...