Etymology
Advertisement

cumulus (n.)

1650s, "a heap," from Latin cumulus "a heap, pile, mass, surplus," from PIE *ku-m-olo-, suffixed shortened form of root *keue- "to swell." Meteorological use for "rounded mass of clouds, snowy white at the top with a darker, horizontal base" is attested by 1803.

updated on June 06, 2018

Advertisement
Advertisement
Definitions of cumulus from WordNet

cumulus (n.)
a globular cloud;
Synonyms: cumulus cloud
cumulus (n.)
a collection of objects laid on top of each other;
Synonyms: pile / heap / mound / agglomerate / cumulation
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.