Dictionary.com
Thesaurus.com

cumulo-

American  
especially before a vowel, cumuli-;

  1. a combining form representing cumulus in compound words.

Etymology

Origin of cumulo-

cumulus, -o-

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.