active layer
Americannoun
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The ground contains a layer known as the "active layer," which freezes and thaws each year.
From Science Daily • Apr. 4, 2026
In aspect ratio phase trapping, defects, as well as the undesirable hexagonal phase, are "trapped" inside the grooves so that the surface of the active layer is a perfect cubic-phase material.
From Science Daily • Jan. 23, 2024
Built in the early 1960s, Arecibo was initially designed to study the Earths ionosphere, the chemically active layer in the upper atmosphere that is ionized by solar radiation.
From Slate • Nov. 23, 2020
Increased phase separation and crystallization have a profound effect on the photophysical and transport properties of the active layer.
From Nature • Aug. 15, 2012
Because the frozen permafrost was just a half meter beneath the active layer of soil, all the water on the tundra stayed near the surface.
From "Two Degrees" by Alan Gratz
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
