purl

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purl

1. a curling movement of water; eddy
2. a murmuring sound, as of a shallow stream
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

purl

[pərl]
(hydrology)
A swirling or eddying stream or rill, moving swiftly around obstructions.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

PURL

(Persistent URL) A URL that points to another URL. PURLs are used when document pages are expected to be moved to different locations from time to time. The PURL is maintained as the official URL for that resource, and when that PURL is requested, a PURL server redirects the browser to the actual current URL. See also Perl.
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