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(Biology) the symptoms of tree decline in central Europe from the 1970s, considered to be caused by atmospheric pollution
[C20: from German Wald forest + sterben to die]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
(forest death) Damage to trees caused by air pollution and secondary infection.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited