Columbia Encyclopedia

Search results

320 results found

African Union

(Encyclopedia)African Union (AU), international organization established in 2002 by the nations of the former Organization of African Unity (OAU). The AU is the successor organization to the OAU, with greater power...

DeGeneres, Ellen Lee

(Encyclopedia) DeGeneres, Ellen Lee, 1958- , American actor and talk-show host, b. Metairie, La. DeGeneres’s parents split in 1974, and she subsequently ...

Henry, Joseph

(Encyclopedia)Henry, Joseph, 1797–1878, American physicist, b. Albany, N.Y., educated at Albany Academy. He taught (1826–32) mathematics and natural philosophy at Albany Academy and was professor of natural phi...

Cruz, Ted

(Encyclopedia) Cruz, Ted (Raphael Edward), 1970- , American politician, b. Calgary, Alberta, Canada (Princeton Univ. (B.A., 1992), Harvard Law School (J.D., 1995). B...

microphone

(Encyclopedia)microphone, device for converting sound into electrical energy, used in radio broadcasting, recording, and sound amplifying systems. Its basic component is a diaphragm that responds to the pressure or...

Kennedy, Anthony McLeod

(Encyclopedia)Kennedy, Anthony McLeod, 1936–, associate justice of the U.S. Supreme Court (1988–2018), b. Sacramento, Calif., grad. Stanford (1958), Harvard Law School (1961). For many years (1965–88) he taug...

solar cell

(Encyclopedia)solar cell, semiconductor devised to convert light to electric current. It is a specially constructed diode, usually made of forms of crystalline silicon or of thin films (as of copper indium gallium ...

Thurmond, Strom

(Encyclopedia)Thurmond, Strom (James Strom Thurmond) thûrˈmənd [key], 1902–2003, U.S. senator from South Carolina (1954–2003), b. Edgefield, S.C. He read law while teaching school (1923–29) and was admitte...

Thomas, Clarence

(Encyclopedia)Thomas, Clarence, 1948–, associate justice of the U.S. Supreme Court (1991–), b. Pin Point (Savannah), Ga. Raised in a poor family, he graduated (1974) from the Yale Law School and became a promin...

robotics

(Encyclopedia)robotics, science and technology of general purpose, programmable machine systems. Contrary to the popular fiction image of robots as ambulatory machines of human appearance capable of performing almo...