n.
An abnormal increase in the number of cells in an organ or a tissue with consequent enlargement.
hyperplastic hy'per·plas'tic (-plăs'tĭk) adj.
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.