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ria

[ree-uh] /ˈri ə/
noun
1.
a long, narrow inlet of a river that gradually decreases in depth from mouth to head.
Origin
1895-1900
1895-1900; < Spanish ría river
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ria

ria

/ˈriːə/
noun
1.
a long narrow inlet of the seacoast, being a former valley that was submerged by a rise in the level of the sea. Rias are found esp on the coasts of SW Ireland and NW Spain
Word Origin
C19: from Spanish, from rio river

RIA

abbreviation
1.
Royal Irish Academy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for ria
n.

from Spanish ria "estuary, river mouth" (adopted as a geological term first in German, 1886), from Latin ripa "stream bank" (see riparian).

Online Etymology Dictionary, © 2010 Douglas Harper
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ria in Medicine

RIA abbr.
radioimmunoassay

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Related Abbreviations for ria

RIA

  1. radioimmunoassay
  2. Research Institute on Addictions
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia Article for ria

funnel-shaped estuary that occurs at a river mouth and is formed by the submergence of the lower portion of the river valley. Generally occurring along a rugged coast perpendicular to a mountain chain, many rias were formed by the rise in sea level after the melting of the vast continental glaciers. Rias are commonly very irregular and may have several branching tributaries; they usually are the major drainage systems of the adjacent areas. Their widening funnel shape and steadily increasing depth seaward usually cause an exaggerated tidal effect within the estuary.

Learn more about ria with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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3
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