noun (plural cumuli) Etymology: Latin Date: 1659 heap , accumulation , a dense puffy cloud form having a flat base and rounded outlines often piled up like a mountain
CUMULUS
Meaning of CUMULUS in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012