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Related to black spot: black spot disease
Any of various fungal or bacterial diseases of plants, resulting in small black spots on the leaves or on other parts.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. a place on a road where accidents frequently occur
2. any dangerous or difficult place
3. (Plant Pathology) a disease of roses, Diplocarpon rosae, that causes circular black blotches on the leaves
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
any of various diseases of plants characterized by the appearance of black spots on the fruit and foliage.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.