cumulonimbus cloud(redirected from Anvil clouds)
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Related to Anvil clouds: Cumulo nimbus
cumulonimbus cloud[¦kyü·myə·lō′nim·bəs ‚klau̇d]
A principal cloud type, exceptionally dense and vertically developed, occurring either as isolated clouds or as a line or wall of clouds with separated upper portions.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.