Definition of "subcortical"

subcortical

adjective
not comparable
1. (medicine) Of or pertaining to the subcortex, the portion of the brain located below the cerebral cortex
2. Beneath the bark of trees.
  Quotations
  More than two-thirds of the trees evidenced subcortical beetles, but no root decay fungi. The latter, without the former, were found in only 2 to 3 percent of the trees.
  1978, George Ferrell, Risk Rating Systems for Mature Red Fir and White Fir in Northern California, page 17