'Cumuli' definitions:

Definition of 'Cumuli'

From: GCIDE
  • Cumulus \Cu"mu*lus\ (k[=u]"m[-u]*l[u^]s), n.; pl. Cumuli (-l[imac]). [L., a heap. See Cumber.] (Meteor.) One of the four principal forms of clouds. SeeCloud. [1913 Webster]