Columbia Encyclopedia

(Encyclopedia) sphere, in geometry, the three-dimensional analogue of a circle. The term is applied to the spherical surface, every point of which is the same distance (the radius) from a certain fixed point (the ce...

(Encyclopedia) LSD or lysergic acid diethylamide līˌsûrˈjĭk, dīˌĕthˈələmĭd, dīˌĕthəlămˈĭd [key], alkaloid synthesized from lysergic acid, which is found in the fungus ergot (Claviceps purpurea). I...

(Encyclopedia) Posner, Richard Allen pōzˈnər [key], 1939–, American jurist and author, b. New York City, grad. Yale (A.B., 1959), Harvard Law School (LL.B., 1962). He clerked for Supreme Court Justice William B...

(Encyclopedia) glycoprotein glīˌkōprōˈtēn [key], organic compound composed of both a protein and a carbohydrate joined together in covalent chemical linkage. These structures occur in many life forms; they are...

(Encyclopedia) Skelligs, rocky islands, off SW Republic of Ireland, in Co. Kerry, comprising Lemon Rock, Little Skellig, and Great Skellig. Climbing the rocks to the peaks of Great Skellig, also known as Skellig Mic...

(Encyclopedia) New Deal, in U.S. history, term for the domestic reform program of the administration of Franklin Delano Roosevelt; it was first used by Roosevelt in his speech accepting the Democratic party nominati...

(Encyclopedia) Securities and Exchange Commission (SEC), agency of the U.S. government created by the Securities Exchange Act of 1934 and charged with protecting the interests of the public and investors in connecti...

(Encyclopedia) Ivan VI, 1740–64, czar of Russia (1740–41), great-grandson of Ivan V. He was the son of Prince Anthony Ulric of Brunswick-Wolfenbüttel and of Anna Leopoldovna. An infant, he succeeded his great-a...

(Encyclopedia) Mackenzie, river, c.1,120 mi (1,800 km) long, issuing from Great Slave Lake, Northwest Territories, Canada, and flowing generally NW to the Arctic Ocean through a great delta. Between Great Slave Lake...

(Encyclopedia) Union, Act of. For the union of England and Scotland (1707), see Great Britain; for the union of Ireland (1800) with Great Britain, see Ireland. ...