cumulus

noun
cu·​mu·​lus | \ ˈkyü-myə-ləs How to pronounce cumulus (audio) \
plural cumuli\ ˈkyü-​myə-​ˌlī How to pronounce cumuli (audio) , -​ˌlē \

Definition of cumulus

2 [ New Latin, from Latin ] : a dense puffy cloud form having a flat base and rounded outlines often piled up like a mountain — see cloud illustration

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Examples of cumulus in a Sentence

the cumulus of sundry things that fill up one's attic and somehow sum up a lifetime of experiences

Recent Examples on the Web

Waterspouts are usually much thinner than normal tornadoes, less severe and formed in less intense weather along the edge of developing cumulus clouds. Laura Johnston, cleveland.com, "Waterspouts pop up in Lake Erie; forecast calls for more possible," 7 Aug. 2019 On most afternoons lately, towering cumulus have formed over the high Sierra in advance of short, intense thunderstorms with booming thunder rolls and pounding hail and rain. Tom Stienstra, SFChronicle.com, "In the central Sierra, Mitchell Peak stands out," 31 July 2019 In Southern California, the wet weather is mostly confined to the deserts and mountains, and buildups of cumulus clouds over the mountains can often be seen from the coast. Los Angeles Times, "Why is L.A. getting so much rain in July? Understanding the summer bumper," 24 July 2019 The Air Force 45th Space Wing’s meteorologists released a forecast on Monday that said cumulus clouds and potential lightning risk were the primary concerns for the launch attempt slated for 6:24 p.m. from Cape Canaveral Air Force Station. Richard Tribou, orlandosentinel.com, "Weather forecast not great for tonight’s planned SpaceX launch," 18 July 2019 Low clouds fall into four divisions: cumulus, stratus, cumulonimbus, and stratocumulus. Catherine Zuckerman, National Geographic, "Clouds, explained," 24 Apr. 2019 The throttle response algorithm is relaxed, the air suspension set to cumulus. Dan Neil, WSJ, "2018 Porsche Panamera: Fast, Furious and, Yes, a Station Wagon," 19 Dec. 2018 Thunderstorms are likely during the afternoon and evening hours over Cape Canaveral, and while these should clear before the launch window opens, lingering cumulus and thick clouds may imperil the attempt. Eric Berger, Ars Technica, "SpaceX launches heavy telecom satellite, sticks high-seas landing," 10 Sep. 2018 The movement of cloud silhouettes scudding across the floor of a distant valley tracks the cumulus shapes racing across the dome of sky. Guy Trebay, Condé Nast Traveler, "In the Heart of Navajo Lands," 19 Oct. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cumulus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of cumulus

1659, in the meaning defined at sense 1

History and Etymology for cumulus

Latin

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More Definitions for cumulus

cumulus

noun

English Language Learners Definition of cumulus

technical : a type of thick cloud that is rounded on top and has a flat base

cumulus

noun
cu·​mu·​lus | \ ˈkyü-myə-ləs How to pronounce cumulus (audio) \
plural cumuli\ -​ˌlī , -​ˌlē \

Kids Definition of cumulus

: a massive cloud form having a flat base and rounded outlines often piled up like a mountain

cumulus

noun
cu·​mu·​lus | \ ˈkyü-myə-ləs How to pronounce cumulus (audio) \
plural cumuli\ -​ˌlī, -​ˌlē How to pronounce cumuli (audio) \

Medical Definition of cumulus

: the projecting mass of granulosa cells that bears the developing ovum in a graafian follicle

called also discus proligerus

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