Learned borrowing from Latin cumulus . Doublet of comble .
Sense 2 (“type of cloud”) was coined by the British chemist and amateur meteorologist Luke Howard (1772–1864): see the 1803 quotation.
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Lewis’s Elementary Latin Dictionary
1890 American Book Company edition; pinned Perseus XML digitizationcumulus
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Borrowed from Latin cumulus .
Learned borrowing from Latin cumulus . Doublet of comble .
Possibly formed as a diminutive of Proto-Indo-European * ḱuh₁-mós ( “ heap ” ) , from "},"3":{"wt":"*-mós"},"nocat":{"wt":"1"}},"i":0}}]}' id="mwdw"> * ḱewh₁- ( “ to swell ” ) + * -mós . Cognates from this root include Ancient Greek κῦμᾰ ( kûmă , “ swell, wave ” ) , Lithuanian saunas ( “ firm, fit, solid, capable ” ) , and Sanskrit श्वयति ( śvayati , “ swell ” ) . However, Schrijver thinks the evidence for deriving cumulus from * ḱewh₁- is weak. Proto-Indo-European * -uH- usually became Latin -ū- before a consonant, but De Vaan argues -u- might be the outcome of a regular sound change that shortened pretonic long vowels before resonants (discussed in Schrijver) or alternatively, analogy with tumulus .
Borrowed from French cumulus , a learned borrowing from Latin cumulus .
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