[dee-gley-shee-ey-shuh n, -see-]

noun Geology.

the gradual melting away of a glacier from the surface of a landmass.

Origin of deglaciation

First recorded in 1890–95; de- + glaciation Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

deglaciation in Science



The uncovering of land that was previously covered by a glacier. Deglaciation occurs when a glacier melts.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.