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symbol for the element lutetiumlutetium,
formerly lutecium
, metallic chemical element; symbol Lu; atomic number 71; at. wt. 174.9668; m.p. about 1,663°C;; b.p. about 3,395°C;; sp. gr. 9.835 at 25°C;; valence +3. Lutetium is a silver-white metal that is relatively stable in air.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



an ancient Chinese state of the Chou period (11th to third centuries B.C.), occupying part of modern Shantung Province. Birthplace of Confucius. After the Chou conquest in 1027 B.C the area became the appanage of Po Ch’in, son of Chou Kung, the regent of the Chou state. One of the most highly developed Chinese states grew out of this appanage, playing a prominent role in the history and culture of ancient China. Declining during the sixth and fifth centuries B.C., Lu disappeared in the third century B.C., when China was united under the Ch’in dynasty

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


The country code for Luxembourg.
This article is provided by FOLDOC - Free Online Dictionary of Computing (


(Logical Unit) In IBM SNA networking, one end of a communications session. The complete LU to LU session is defined by session type. Following are the common types. See SNA.

     1  Host to 3770 RJE terminal
     2  Host to 3270 mainframe terminal
     3  Host to 3270 printer
   6.2  Program-to-program
     7  Host to 5250 midrange terminal
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