Main Entry:

cu·mu·lus

Pronunciation:

\-ləs\

Function:

noun

Inflected Form(s):

plural cu·mu·li \-ˌlī, -ˌlē\

Etymology:

Latin

Date:

1659

1: heap, accumulation2 [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