cumulonimbus
cu·mu·lo·nimbus
noun
1.
a dark cloud of great vertical extent charged with electricity; associated with thunderstorms
Origin
From Latin cumulus (“heap”) + nimbus (“cloud”).
Related words
Word family
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.