understratum

(redirected from understrata)
Also found in: Dictionary.

understratum

(ŭn′dər-strā′təm, -străt′əm)
n. pl. under·strata (-strā′tə, -străt′ə) or under·stratums
A substratum.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.