the anvil-shaped top of a cumulonimbus cloud
WordReference Random House Learner's Dictionary of American English © 2025
WordReference Random House Unabridged Dictionary of American English © 2025
thun•der•head
(thun′dər hed′),USA pronunciation n. [Meteorol.]
- Meteorologyincus (def. 2).
- Meteorologycumulonimbus.
- Meteorologythe upper portion of a cumulus cloud characterized by dense, sharply defined, cauliflowerlike upper parts and sometimes by great verticality.
- thunder + head 1850–55, American.
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'thunderhead' also found in these entries (note: many are not synonyms or translations):