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Hydra, in Greek mythology

(Encyclopedia)Hydra, in Greek mythology, many-headed water serpent; offspring of Typhon and Echidna. When one of its heads was cut off, two new heads appeared. The second labor of Hercules was to kill the monster. ...

machine tool

(Encyclopedia)machine tool, power-operated tool used for finishing or shaping metal parts, especially parts of other machines. An establishment that is equipped with such tools and specializes in such work is known...

Caguas

(Encyclopedia)Caguas käˈgwäs, käˈwäs [key], city, E central Puerto Rico. Largest of Puerto Rico's inland ...

die

(Encyclopedia)die, any of various devices used for drawing wire, and for blanking, bending, cutting, machine forging, and embossing. Dies used for striking, or stamping, coins and medals are cut in intaglio, one fo...

Thrasea Paetus

(Encyclopedia)Thrasea Paetus (Publius Clodius Thrasea Paetus) thrāsēˈə pēˈtəs [key], d. a.d. 66, Roman senator and Stoic philosopher. He criticized Nero, who commanded the senate to condemn him to death. Whe...

Clayton Antitrust Act

(Encyclopedia)Clayton Antitrust Act, 1914, passed by the U.S. Congress as an amendment to clarify and supplement the Sherman Antitrust Act of 1890. It was drafted by Henry De Lamar Clayton. The act prohibited exclu...

sawmill

(Encyclopedia)sawmill, installation or facility in which cut logs are sawed into standard-sized boards and timbers. The saws used in such an installation are generally of three types: the circular saw, which consis...

sphere

(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...

Nordfjord

(Encyclopedia)Nordfjord nôrˈfyôrˌ, no͝orˈfyo͝orˌ [key], inlet, c.50 mi (80 km) long, Sogn og Fjordane co., SW Norway. To the south, between Nordfjord and Sognafjord, is Jostedalsbreen glacier. The Nordfjord...

Palmer, Erastus Dow

(Encyclopedia)Palmer, Erastus Dow, 1817–1904, American sculptor, b. Pompey, N.Y., self-taught. A carpenter in his youth, he spent his leisure time cutting cameos. He progressed to carving bas-reliefs and then fig...