Definition for active layer - Oxford Dictionaries Online (World English)

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	active layer (ac¦tive layer) noun Geography the seasonally thawed surface layer above permafrost.		More words in this category coastland conformal depression dimetric epilimnion erg 2 gilgai hummock land bridge outfall panhandle peak 1 PRC projection seaboard sunbelt tideline timbered unwooded wold Nearby Words activation analysis activation energy active active barrier active birth active carbon active citizen active duty active immunity active layer active list active matrix active service active site active transport activewear activism activity actomyosin