asymbolia

[ā′sĭm-bōlē-ə]
n.
  1. A loss of the ability to comprehend by touch the form and nature of an object.
  2. A form of aphasia in which the significance of signs cannot be comprehended.asemasia
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.