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Pr,

symbol for the element praseodymiumpraseodymium
[Gr., =green twin], metallic chemical element; symbol Pr; at. no. 59; at. wt. 140.90765; m.p. 931°C;; b.p. 3,512°C;; sp. gr. about 6.8; valence +3 or +4. Praseodymium is a soft, malleable, ductile, silver-yellow metal.
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The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
Parks Directory of the United States, 5th Edition. © 2007 by Omnigraphics, Inc.

Pr

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

PR

On drawings, abbr. for “pair.”
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

PR

(1)

pr

(networking)
The country code for Puerto Rico.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
References in periodicals archive ?
Differences between PRS items and non-PRS items on the exams (based on ratings by the professors) were evaluated for level of critical thinking needed and for the importance of being in class using independent sample t-tests.
As shown in Table 2, at the end of the course, students rated the PRS experience more favorably than the non-PRS experience on four of the five items.
At the same time, the PRS technology has great appeal for use in the human sexuality course for several reasons.
"But, often unknowingly, many thousands more are not, and we want those companies to be aware that they need to adhere to UK copyright law and to buy a PRS Music Licence.'
A PRS music licence can cost as little as pounds 66 a year.
Undoubtedly, there will be barriers to using PRS in library instruction.
Another concern is that you will be giving up some valuable class time in order to implement PRS in your sessions.
As a result of the property's decline in value and the workout, PRS had two items to allocate between A and B.
Under the terms of the original partnership agreement, PRS would have allocated these items equally between A and B.