| 单词 | polar cap |
| 释义 | polar capnounGeology. the icecap situated at either end of the earth's poles. Astronomy. either of the two bright areas around the poles of the planet Mars, consisting of water ice and frozen carbon dioxide. Origin of polar capFirst recorded in 1890–95 Words nearby polar cappolar, polar axis, polar bear, polar body, polar bond, polar cap, polar cataract, polar circle, polar coordinate, polar coordinates, polar coordinate system Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Scientific definitions for polar cappolar cap The mass of ice that covers either of the Earth's polar regions year-round. The mass of frozen carbon dioxide and water that covers either of Mars's polar regions. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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