n. (Abbr. LD)
Any of various cognitive, neurological, or psychological disorders that impede the ability to learn, especially one that interferes with the ability to learn mathematics or develop language skills. Also called learning disorder.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
