2. / Dictionary
  3. / Index A

active layer: Meaning and Definition of

ac'tive lay"er

Pronunciation: [key]
  1. (in arctic or subarctic regions) the layer of soil, above the permafrost, that thaws during the summer.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
active immunity active mass
sandbbox logo
©2022 Sandbox Networks Inc. All rights reserved. Sandbox Learning is part of Sandbox & Co., a digital learning company.