Variant of cumulus
- a heap; mass; pile
- the type of bright, billowy cloud with a dark, flat base, that develops vertically through all cloud levels and consists mostly of water droplets
Origin: Classical Latin a heap ; from Indo-European an unverified form u-melos, a swelling, increase ; from base an unverified form eu-, a swelling from source cave
Used by arrangement with John Wiley & Sons, Inc.