| 单词 | clear-air turbulence |
| 释义 | clear-air turbulence[ kleer-air ] / ˈklɪərˈɛər / nounatmospheric turbulence, sometimes severe, occurring in air devoid of clouds or other visible indicators that turbulence might be present. Abbreviation: CAT Origin of clear-air turbulenceFirst recorded in 1950–55 Words nearby clear-air turbulenceclean technology, Cleanthes, cleanup, clean wool, clear, clear-air turbulence, clearance, clear and present danger, clear as a bell, clear as crystal, clear as mud Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Scientific definitions for clear-air turbulenceclear-air turbulence [ klîr′âr′ ] Atmospheric turbulence that occurs under tranquil and cloudless conditions at high altitudes near jet streams, mountain ranges, and developing storm systems. It subjects aircraft to strong updrafts and downdrafts. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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