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Alvarez, Luis Walter

(Encyclopedia)Alvarez, Luis Walter, 1911–88, American physicist, b. San Francisco, grad. Univ. of Chicago, 1932, Ph.D. 1936. He was awarded the 1968 Nobel Prize in Physics for his discovery of a large number of r...

altar

(Encyclopedia)altar, table or platform for the performance of religious sacrifice. In its simplest form the altar is a small pile, with a square or circular surface, made of stone or wood. Its features vary accordi...

nautilus, in zoology

(Encyclopedia)nautilus or chambered nautilus, cephalopod mollusk belonging to the sole surviving genus (Nautilus) of a subclass that flourished 200 million years ago, known as the nautiloids. The spirally coiled sh...

pangolin

(Encyclopedia)pangolin păng-gōˈlĭn [key], armored, toothless mammal of tropical Asia and Africa. Pangolins range in length from 3 to 6 ft (90–180 cm) including the long, broad tail. Their snouts are narrow an...

adhesive

(Encyclopedia)adhesive, substance capable of sticking to surfaces of other substances and bonding them to one another. The term adhesive cement is sometimes used in place of adhesive, especially when referring to a...

pitcher plant

(Encyclopedia)pitcher plant, any of several insectivorous plants with leaves adapted for trapping insects. Each leaf forms a “pitcher,” a somewhat trumpet-shaped enclosure, usually containing a liquid. An insec...

integrated circuit

(Encyclopedia)integrated circuit (IC), electronic circuit built on a semiconductor substrate, usually one of single-crystal silicon. The circuit, often called a chip, is packaged in a hermetically sealed case or a ...

megachurch

(Encyclopedia)megachurch, large Protestant church with an average weekly attendance of 2,000 or more; relatively uncommon until after 1970. In the United States, where most megachurches are located, there were more...

Oporto

(Encyclopedia)Oporto o͝opôrˈtō [key], Port. Pôrto, city (1991 pop. 310,600), capital of Porto dist. and Douro Litoral, NW Portugal, near the mouth of the Douro River. It is Portugal's second largest city, afte...

Dravidian languages

(Encyclopedia)Dravidian languages drəvĭdˈēən [key], family of about 23 languages that appears to be unrelated to any other known language family. The Dravidian languages are spoken by more than 200 million peo...