heteromeric

[hĕt′ə-rō-mĕrĭk]
adj.
  1. Having a different chemical composition.
  2. Of or relating to spinal neurons that have processes passing over to the opposite side of the cord.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.