ICA abbreviation for 1. (Art Terms) (in Britain) Institute of Contemporary Arts 2. (Government, Politics & Diplomacy) International Cooperation Administration Içá (?i?s??; Portuguese i?sa) n (Placename) the Brazilian part of the river PutumayoCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Pu?tu?ma?yo (?pu tu?m? y?) n. a river in NW South America, flowing SE from S Colombia into the Amazon in NW Brazil. 900 mi. (1450 km) long. Portuguese, Içá. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.