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a. learning disability
2. lethal dose
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. (Pharmacology) lethal dosage: usually used with a subscript numeral showing what percentage of a test group of animals dies as a result of either being given a substance being tested on them or being exposed to ionizing radiation, esp in the median lethal dose: LD50.
2. (Languages) Low Dutch
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
1. praise (be) to God.
[< Latin laus Deō]
2. lethal dose.
3. long distance (telephone call).
4. (in Libya) dinar.
median lethal dose.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.