ria

ria

[ree-uh]
noun
a long, narrow inlet of a river that gradually decreases in depth from mouth to head.

Origin:
1895–1900; < Spanish ría river

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Collins
World English Dictionary
ria (ˈriːə)
 
n
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
 
[C19: from Spanish, from rio river]

RIA
 
abbreviation for
Royal Irish Academy

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

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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American Heritage
Abbreviations & Acronyms
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 Britannica
Encyclopedia

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.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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