cumulo-


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cumulo-

or cumuli- or cumul-
pref.
Cumulus: cumulonimbus.

[From cumulus.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

cu•mu•lus

(ˈkyu myə ləs)

n., pl. -li (-ˌlaɪ)
1. a cloud of a class characterized by dense individual elements in the form of puffs, mounds, or towers, with flat bases and tops that often resemble cauliflower.
2. a heap; pile.
[1650–60; < New Latin (Latin: mass, pile)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.